IBM Langflow OSS 1.0.0-1.12.2 Authenticated File Write/Read Bypass
CVE-2026-97677 Published on November 8, 2026
Langflow OSS is affected by multiple vulnerabilities
IBM Langflow OSS 1.0.0 through 1.12.2 An authenticated flow author could write attacker-controlled file content into any directory writable by the service account, bypassing the platform's local file access isolation safeguard. Via a crafted on-disk index, the attacker could also read the contents of arbitrary files accessible to the service process including configuration files, secrets, or database files stored under the application's data directory.
Vulnerability Analysis
CVE-2026-97677 can be exploited with network access, and requires small amount of user privileges. 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 and integrity, and no impact on availability.
Weakness Type
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2026-97677 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-97677
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Affected Versions
IBM Langflow OSS:- Version 1.0.0, <= 1.12.2 is affected.