IBM Langflow OSS 1.0.0-1.11.1 NS Collision Remote Info Disclosure & Msg Injection
CVE-2026-18904 Published on August 28, 2026
Langflow is affected by multiple authentication bypass, path traversal, authorization, and server-side request forgery vulnerabilities
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.
Vulnerability Analysis
CVE-2026-18904 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity, and no impact on availability.
Weakness Type
What is an Insecure Direct Object Reference / IDOR Vulnerability?
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CVE-2026-18904 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.
Products Associated with CVE-2026-18904
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Affected Versions
IBM Langflow OSS:- Version 1.0.0, <= 1.11.1 is affected.