CVE-2026-51883

Published: Oct 1, 2026Modified: Oct 5, 2026Deferred

9.1

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitability: 3.9 / Impact: 5.2

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

The knowledge base creation and document upload interfaces in Langchain-Chatchat 0.3.0;0.3.1 is vulnerable to path traversal. An attacker can inject path traversal sequences (such as `..\`) into the `knowledge_base_name` parameter to write knowledge base content to arbitrary locations outside the configured knowledge base root directory.

Related CWEs

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product 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 product 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.

References (3)

https://gist.github.com/Ro1ME/30f5139a2920bf7075299a33eb1690f2

Source: cve@mitre.org

https://github.com/chatchat-space/Langchain-Chatchat/issues/5467

Source: cve@mitre.org

https://github.com/chatchat-space/Langchain-Chatchat/issues/5467

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.