CVE-2026-51882

CRITICALCVSS 9.1

Description

The OpenAI-compatible file upload endpoint `/v1/files` in Langchain-Chatchat 0.3.0 is vulnerable to path traversal. An attacker can write files to arbitrary locations outside the `openai_files` directory by crafting malicious filenames.

Timeline

Published:October 1st, 2026 10:17 PM

Last modified:October 7th, 2026 3:17 PM

CVSS Scoring

CVSS v3: 9.1 (CRITICAL)

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

Weaknesses (CWE)

CWE-22

References & Reports

Advisories, patches, and third-party reports

https://gist.github.com/Ro1ME/f80ac458836b59adb9c6ceff3993f7f3
https://github.com/chatchat-space/Langchain-Chatchat/issues/5468
https://gist.github.com/Ro1ME/f80ac458836b59adb9c6ceff3993f7f3
https://github.com/chatchat-space/Langchain-Chatchat/issues/5468

Source: NIST NVD · Data may lag official sources by up to one minute