CVE-2026-51882

critical · 9.1

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.

9.1

CVSS

0.5%

EPSS (exploit prob.)

43rd

EPSS percentile

2026-10-01

Published

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

Weaknesses

CWE-22

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-51882