CVE-2026-51882

critical

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.

References

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

https://gist.github.com/Ro1ME/f80ac458836b59adb9c6ceff3993f7f3

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-91123

Details

Source: Mitre, NVD

Published: 2026-10-01

Updated: 2026-10-02

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

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

Severity: Critical

EPSS

EPSS: 0.00145

Detections

Analytics