CVE-2026-51884

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

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

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

Description

The /knowledge_base/upload_temp_docs temporary document upload endpoint in Langchain Chatchat 0.3.1 is vulnerable to path traversal. By crafting malicious filenames, an attacker can write files to arbitrary locations on the server, bypassing the intended restrictions on the temporary 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/da028c9ce13dd888e265b9bef01d6eca

Source: cve@mitre.org

https://github.com/chatchat-space/Langchain-Chatchat/issues/5466

Source: cve@mitre.org

https://github.com/chatchat-space/Langchain-Chatchat/issues/5466

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

Timeline

No history available yet.