IBM Langflow OSS 1.12.3 remote Auth File Overwrite via path traversal
CVE-2026-77819 Published on October 29, 2026
Langflow OSS is affected by multiple vulnerabilities
IBM Langflow OSS 1.0.0 through 1.12.3 could allow a remote authenticated attacker to overwrite arbitrary files due to improper limitation of a pathname to a restricted directory.
Vulnerability Analysis
CVE-2026-77819 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 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-2026-77819 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-77819
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Affected Versions
IBM Langflow OSS:- Version 1.0.0, <= 1.12.3 is affected.