IBM Langflow OSS 1.0.01.10.3 Path Traversal via Username: Arbitrary Deletion
CVE-2026-7658 Published on August 5, 2026
Langflow OSS is affected by arbitrary code execution in custom component validation and trusted code enforcement
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.
Vulnerability Analysis
CVE-2026-7658 is exploitable 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 no impact on confidentiality, a high impact on 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-2026-7658 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-7658
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Affected Versions
IBM Langflow OSS:- Version 1.0.0, <= 1.10.3 is affected.