IBM Langflow Oss
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By the Year
In 2026 there have been 76 vulnerabilities in IBM Langflow Oss with an average score of 8.4 out of ten.
| Year | Vulnerabilities | Average Score |
|---|---|---|
| 2026 | 76 | 8.36 |
It may take a day or so for new Langflow Oss vulnerabilities to show up in the stats or in the list of recent security vulnerabilities. Additionally vulnerabilities may be tagged under a different product or component name.
Recent IBM Langflow Oss Security Vulnerabilities
IBM Langflow OSS 1.0.0-1.11.1 Authenticated Command Exec via Flow Type
CVE-2026-19295
9.9 - Critical
- August 28, 2026
IBM Langflow OSS 1.0.0 through 1.11.1 allows an authenticated attacker to execute arbitrary operating system commands in the server process by saving a flow with a crafted type field value and triggering a build of a wrapper flow that references it. This allowed privilege escalation from "authenticated flow user" to arbitrary OS-level command execution under the server process identity, bypassing the LANGFLOW_ALLOW_CUSTOM_COMPONENTS=false policy control.
Eval Injection
IBM Langflow OSS 1.0.0-1.11.1 Auth Exfil Via Improper Auth
CVE-2026-19294
6.4 - Medium
- August 28, 2026
IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote authenticated attacker to execute and read any user's private flow due to improper authorization.
Insecure Direct Object Reference / IDOR
IBM Langflow OSS 1.0.0-1.11.1 Remote Code Execution via A2A Endpoint
CVE-2026-19286
9.8 - Critical
- August 28, 2026
IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to execute arbitrary code due to improper enforcement of security restrictions on the A2A public endpoint.
Code Injection
IBM Langflow OSS 1.0.0-1.11.1 NS Collision Remote Info Disclosure & Msg Injection
CVE-2026-18904
8.2 - High
- August 28, 2026
IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to obtain sensitive information and inject unauthorized messages due to a namespace collision between user identifiers.
Insecure Direct Object Reference / IDOR
IBM Langflow OSS 1.0.01.11.1 Remote File Path Traversal
CVE-2026-18899
7.5 - High
- August 28, 2026
IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to read arbitrary files due to path traversal.
Directory traversal
IBM Langflow OSS 1.0.0-1.11.1 Improper Auth RCE
CVE-2026-18891
8.2 - High
- August 28, 2026
IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote attacker to execute arbitrary flows and access sensitive information due to improper authentication.
authentification
IBM Langflow OSS RCE via improper code gen in 1.0.01.11.1
CVE-2026-18729
8.8 - High
- August 28, 2026
IBM Langflow OSS 1.0.0 through 1.11.1 could allow a remote authenticated attacker to execute arbitrary code due to improper control of generation of code.
Code Injection
IBM Langflow OSS SSRF Vulnerability 1.0.0-1.11.1
CVE-2026-18545
4.3 - Medium
- August 28, 2026
IBM Langflow OSS 1.0.0 through 1.11.1 is vulnerable to server-side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks.
SSRF
IBM Langflow OSS 1.01.9.6 Unchecked Auth Attempts Expose Accounts
CVE-2026-19297
9.1 - Critical
- August 13, 2026
IBM Langflow OSS 1.0.0 through 1.9.6 could allow a remote attacker to obtain unauthorized access to user accounts due to improper restriction of excessive authentication attempts.
Improper Restriction of Excessive Authentication Attempts
IBM Langflow OSS RCE via Improper Import Validation (pre-1.10.3)
CVE-2026-17624
8.5 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, and 1.0.0 through 1.10.3 could allow a remote authenticated attacker to execute arbitrary code due to improper validation of module imports.
Code Injection
Remote Code Exec via Code Injection in IBM Langflow OSS 1.0.0-1.10.3
CVE-2026-17633
8.5 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 could allow a remote authenticated attacker to execute arbitrary code due to code injection.
Code Injection
IBM Langflow 1.0.0-1.10.3 RAA Exec via AST Validation Flaw
CVE-2026-17632
8.8 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 could allow a remote authenticated attacker to execute arbitrary code due to improper validation of Python code during AST-based security scanning.
Code Injection
IBM Langflow OSS 1.0.0-1.10.3 Auth Exec via LLMgenerated Python Validation
CVE-2026-9196
8.1 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 could allow an authenticated attacker to execute unintended code during Agentic Assistant validation due to improper handling of LLMgenerated components. The application executes modelgenerated Python code in the backend during validation prior to user approval, which may allow an attacker to trigger side effects such as outbound network access, file system interaction, or data exfiltration with the privileges of the Langflow backend process.
Code Injection
Arbitrary Code Execution in IBM Langflow OSS 1.0.0-1.10.3 via 2 HTTP Rqs
CVE-2026-8182
8.8 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 installations allow anyone on the internet to execute arbitrary code on the server without any credentials via 2 HTTP requests.
Code Injection
IBM Langflow 1.0.0-1.10.3: Truncated SHA256 Authenticated Code Exec
CVE-2026-9201
8.8 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 could allow an authenticated attacker to execute arbitrary code due to a cryptographic weakness in the custom component validation mechanism. When the optional hardening mode that restricts execution to trusted component templates is enabled, the application validates component code using a truncated SHA256 hash. Because the hash comparison relies on only a portion of the digest, an attacker can craft malicious component code that collides with a trusted template hash and bypasses validation. Successful exploitation allows the attacker to introduce and execute unauthorized Python code within the Langflow process, defeating the intended security control and potentially leading to full compromise of the affected instance.
Inadequate Encryption Strength
IBM Langflow OSS 1.0.0-1.10.3 RCE via Improper Input Control
CVE-2026-8478
8.8 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 could allow a remote attacker to inject arbitrary code on the system, due to the improper control of user input code.
Code Injection
IBM Langflow OSS 1.0.0-1.10.3 URL DIRTRAV
CVE-2026-8183
7.7 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, and 1.0.0 through 1.10.3 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot " sequences ( /.. /) to v i ew arbitrary files on the system.
Directory traversal
IBM Langflow OSS 1.0.01.10.3 Path Traversal via Username: Arbitrary Deletion
CVE-2026-7658
6.5 - Medium
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate the username field, allowing attackers to inject path traversal sequences and bypass containment checks. This enables multiple severe impacts, including arbitrary directory deletion, cross-tenant data destruction, and JWT signing key deletion leading to session invalidation.
Directory traversal
IBM Langflow OSS <1.10.3: MemoryComponent Auth Bypass & Cross-User Disclosure
CVE-2026-9130
7.1 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 contain an authorization bypass vulnerability in the MemoryComponent that allows authenticated users to access chat history of other users via session_id collision. The MemoryComponent.retrieve_messages and store_message methods filter on session_id without validating flow_id or user_id ownership, enabling cross-user information disclosure through multiple authenticated API endpoints including /api/v1/run/*, /api/v1/responses, and /api/v2/workflow/*. This vulnerability only affects multi-user deployments with LANGFLOW_AUTO_LOGIN=False.
Insecure Direct Object Reference / IDOR
IBM Langflow 1.0.0-1.10.3 POST /api/v1/build/{flow_id}/vertices OW Validation Leak
CVE-2026-10547
5.9 - Medium
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 does not properly validate ownership in the deprecated POST /api/v1/build/{flow_id}/vertices endpoint, allowing an authenticated user to inject arbitrary graph data into a shared cache for any flow. This may result in cross-user cache pollution, unauthorized workflow execution, or denial of service.
Authorization
Path Traversal IBM Langflow OSS 1.0.01.10.3 KB API
CVE-2026-7869
5.4 - Medium
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 is vulnerable to Path Traversal in the Knowledge Bases API (`POST /api/v1/knowledge_bases`). This occurs because user-supplied knowledge base names are used directly to create file paths without proper sanitization or containment checks. An authenticated attacker can exploit this flaw to create directories and write files anywhere on the server's filesystem.
Directory traversal
IBM Langflow OSS 1.10.3: Fernet Key Gen Flaw via Python MT PRNG
CVE-2026-8470
7.4 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, and 1.0.0 through 1.10.3 use Python's non-cryptographic random module for generating Fernet encryption keys from user secrets under 32 characters. The deterministic Mersenne Twister PRNG produces identical keys for identical seeds, allowing attackers to reproduce encryption keys and decrypt stored API keys and authentication tokens.
Use of a Broken or Risky Cryptographic Algorithm
IBM Langflow OSS Weak Crypto Key Derivation in ensure_fernet_key()
CVE-2026-9205
7.4 - High
- August 05, 2026
IBM Langflow OSS contains a weak cryptographic key derivation vulnerability in the ensure_fernet_key() function.
PRNG
Auth env var exposure via IBM Langflow OSS <1.10.3 component
CVE-2026-10128
6.5 - Medium
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 allows authenticated users can exploit a built-in Langflow component to read arbitrary server environment variables, exposing sensitive secrets despite security controls intended to disable custom components.
Information Disclosure
IBM Langflow OSS 1.10.3 SSRF via OLLAMA_BASE_URL
CVE-2026-9081
7.1 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3, and 1.0.0 through 1.10.3 contains a Server-Side Request Forgery (SSRF) vulnerability in the validate_model_provider_key() function for the Ollama provider. The function accepts a user-supplied OLLAMA_BASE_URL parameter and passes it directly to requests.get() without validation, scheme/host allowlisting, or filtering of private IP ranges (loopback, RFC1918, link-local addresses).
SSRF
IBM Langflow OSS 1.0.0-1.10.3 SSRF via incomplete protection
CVE-2026-7657
6.5 - Medium
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 Langflow could allow server-side request forgery (SSRF) due to incomplete and ineffective SSRF protection enforcement.
SSRF
IBM Langflow OSS <=1.10.3 Cmd Exec via OS Command injection
CVE-2026-17625
7.2 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, and 1.0.0 through 1.10.3 could allow a remote authenticated attacker to execute arbitrary commands due to improper neutralization of special elements used in an OS command.
Shell injection
IBM Langflow OSS 1.0-1.10.3 MCP cmd exec (auth)
CVE-2026-17623
8.8 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 could allow a remote authenticated attacker to execute arbitrary commands due to improper validation of the command field in MCP server configurations.
Shell injection
IBM Langflow OSS 1.0.0-1.10.3 RCE via improperly validated config
CVE-2026-17630
7.2 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 could allow a remote attacker to execute arbitrary code due to improper validation of configuration parameters.
Denylist / Deny List
IBM Langflow OSS 1.0.01.10.3: Authenticated Docker Volume-Mount Disclosure
CVE-2026-17626
8.8 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 Langflow could allow an authenticated attacker to read, modify, or expose sensitive host files via Docker-based MCP servers due to incomplete filtering of dangerous Docker volume-mount and device-mapping arguments.
Incorrect Privilege Assignment
IBM Langflow OSS 1.0.01.10.3 Auth Bypass via MCP composer endpoint (default enabled)
CVE-2026-8446
7.5 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 contain an authentication bypass vulnerability in the Model Context Protocol (MCP) composer endpoint when mcp_composer_enabled=true (default) and projects are configured with auth_type=oauth .
Missing Authentication for Critical Function
IBM Langflow OSS <1.10.3 Arbitrary File Read via Res/Read Path Trv
CVE-2026-7646
6.5 - Medium
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 allows users to read arbitrary files from the server filesystem, including other users' uploaded documents, the JWT signing secret, the SQLite database, and process environment variables, by sending a crafted MCP `resources/read` request with a URL-encoded path traversal sequence in the filename.
Directory traversal
IBM Langflow OSS Auth Bypass, pre-1.10.4 allows config file write
CVE-2026-9077
8.5 - High
- August 05, 2026
IBM Langflow OSS 1.0.0 through 1.10.3 Langflow allows remote authenticated attackers to bypass localhost-only restrictions and write arbitrary MCP server configurations to IDE configuration files on the host system.
Reliance on Untrusted Inputs in a Security Decision
IBM Langflow RCE via User Input (v1.0.01.10.0)
CVE-2026-12946
9.9 - Critical
- July 30, 2026
IBM Langflow OSS 1.0.0 through 1.10.0 could allow a remote attacker to inject arbitrary code on the system, due to the improper control of user input code.
Code Injection
IBM Langflow OSS 1.0.0-1.10.1 Stale Vector Access via Chroma Persist Dir
CVE-2026-13444
8.1 - High
- July 30, 2026
IBM Langflow OSS 1.0.0 through 1.10.1 can allow an attacker to access another user's private vector documents by creating their own flow with matching Chroma persist_directory and collection_name values. The attacker receives exact victim content in their workflow output despite having no authorization to read the victim's flow. Additionally, the attacker can pollute the victim's collection by inserting their own documents into the shared namespace.
.NET Misconfiguration: Use of Impersonation
Broken Access Control IDOR in IBM Langflow OSS 1.0.0-1.8.4 File API
CVE-2026-10700
6.5 - Medium
- July 30, 2026
IBM Langflow OSS 1.0.0 through 1.8.4 contains multiple broken access control vulnerabilities in its file handling API that allow unauthorized access to user files.The /api/v1/files/images/{flow_id}/{file_name} endpoint does not enforce authentication or authorization checks, allowing unauthenticated remote attackers to retrieve image files associated with any flow by specifying a valid flow_id and file_name.Additionally, the /api/v1/files/download/{flow_id}/{file_name} endpoint requires authentication but fails to properly validate ownership of the requested resource. As a result, an authenticated user can access files belonging to other users by supplying arbitrary identifiers, leading to an authorization bypass (IDOR).Successful exploitation may result in unauthorized disclosure of sensitive data, including files stored in private flows. This issue breaks tenant isolation in multi-user deployments.
Insecure Direct Object Reference / IDOR
IBM Langflow OSS <1.10.2 Improper Input Validation in PythonREPL Sandbox
CVE-2026-13435
9.9 - Critical
- July 30, 2026
IBM Langflow OSS 1.0.0 through 1.10.1 contains an improper input validation vulnerability in the PythonREPL sandbox implementation.
Code Injection
IBM Langflow OSS 1.0.0-1.10.1 Dir Traversal via dotdot URL
CVE-2026-12942
7.5 - High
- July 30, 2026
IBM Langflow OSS 1.0.0 through 1.10.1 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot " sequences ( /.. /) to view arbitrary files on the system.
Directory traversal
IBM Langflow OSS 1.0.0-1.10.1 Auth Bypass: Log Retrieve & Build Endpoints
CVE-2026-12945
7.1 - High
- July 30, 2026
IBM Langflow OSS 1.0.0 through 1.10.1 allows authenticated users to access and manipulate other users' build jobs through improper access control on log retrieval and unauthenticated build endpoints.
Insecure Direct Object Reference / IDOR
Unauth RCE in IBM Langflow OSS 1.0.0-1.10.1 via env var injection
CVE-2026-12940
9.8 - Critical
- July 30, 2026
IBM Langflow OSS 1.0.0 through 1.10.1 are vulnerable to unauthenticated remote code execution via environment variable injection in the MCP (Model Context Protocol) stdio launcher. The vulnerability exists in src/lfx/src/lfx/base/mcp/util.py where the DANGEROUS_ENV_VARS blocklist fails to include SHELLOPTS , BASHOPTS , and PS4 environment variables.
Shell injection
IBM Langflow OSS 1.0-1.10.1 FAISS reuse causes cross-user data disclosure
CVE-2026-13442
7.1 - High
- July 28, 2026
IBM Langflow OSS 1.0.0 through 1.10.1 can allow an attacker to reuse another user's FAISS namespace to access owner-only vector content and influence later query results. This causes cross-user information disclosure and limited integrity impact through persistent poisoning of returned results.
.NET Misconfiguration: Use of Impersonation
IBM Langflow OSS 1.0.01.10.1 SaveToFile Absolute Path UI Bypass
CVE-2026-13445
8.1 - High
- July 17, 2026
IBM Langflow OSS 1.0.0 through 1.10.1 can allow an authenticated attacker to exploit the SaveToFile component to read and modify another user's uploaded files by specifying absolute paths pointing to victim storage locations. In append mode, the attacker's workflow reads victim file contents, appends attacker-controlled data, and uploads a copy containing victim data to the attacker's namespace (confidentiality breach). In overwrite mode, the attacker can replace victim file contents with arbitrary data (integrity breach). This breaks the storage ownership boundary between users.
Insecure Direct Object Reference / IDOR
IBM Langflow OSS 1.0.0-1.10.1 Hard-Coded Credential Exposure
CVE-2026-13446
9.8 - Critical
- July 17, 2026
IBM Langflow OSS 1.0.0 through 1.10.1 contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data.
Use of Hard-coded Credentials
IBM Langflow OSS RCEx before 1.10.2 via /api/v1/build_public_tmp
CVE-2026-13448
8.1 - High
- July 17, 2026
IBM Langflow OSS 1.0.0 through 1.10.1 Lanflow OSS contains an unauthenticated remote code execution vulnerability in the public flow build endpoint ( /api/v1/build_public_tmp/{flow_id}/flow ). The vulnerability stems from an incomplete denylist in the validate_public_flow_no_code_execution() function that fails to block several code-execution agent components including OpenDsStarAgent, CodeActAgentSmolagents, and CSVAgent.
Denylist / Deny List
IBM Langflow OSS 1.0.0-1.10.1 Auth CmdExec via Python Interpreter
CVE-2026-14499
8.8 - High
- July 17, 2026
IBM Langflow OSS 1.0.0 through 1.10.1 Langflow could allow an authenticated user to execute arbitrary commands with elevated privileges on the system due to improper validation of user supplied input in the Python Interpreter component.
Shell injection
IBM Langflow <1.10.0 Arbitrary File Write via Malicious Flow
CVE-2026-7667
8.8 - High
- July 17, 2026
IBM Langflow OSS 1.0.0 through 1.10.0 allows an authenticated attacker to create a malicious flow pointing to an attacker-controlled URL that returns a specially crafted Content-Disposition header (e.g., filename="../../../target/path" ), enabling arbitrary file write operations with attacker-controlled content to any path accessible by the Langflow process.
Directory traversal
IBM Langflow_OSS 1.0.0-1.10.0 SSRF via insecure default config
CVE-2026-7754
7.7 - High
- July 17, 2026
IBM Langflow OSS 1.0.0 through 1.10.0 Langflow 1.9.0 could allow server-side request forgery (SSRF) due to insecure default configuration and incomplete enforcement of the SSRF protection mechanism.
SSRF
Remote Code Exec in IBM Langflow OSS 1.0-1.10.0 MCP Config
CVE-2026-7755
8.8 - High
- July 17, 2026
IBM Langflow OSS 1.0.0 through 1.10.0 Langflow could allow remote code execution due to incomplete validation enforcement on MCP server configuration files.
Improper Input Validation
IBM Langflow OSS 1.0.0-1.10.0 Authenticated File Read & JWT Forgery
CVE-2026-7872
7.5 - High
- July 17, 2026
IBM Langflow OSS 1.0.0 through 1.10.0 allows an authenticated attacker to read arbitrary files including the JWT signing key and forge authentication tokens for any user.
Directory traversal
IBM Langflow OSS <1.11: Authenticated Runtime Param Override via API
CVE-2026-8056
8.8 - High
- July 17, 2026
IBM Langflow OSS 1.0.0 through 1.10.0 allows authenticated users to override component parameters at runtime via the API. A critical security flaw exists in the parameter filtering mechanism within the `apply_tweaks()` function.
Code Injection
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