CVE-2025-6853CRITICAL 9.8EPSS p37.7%

CVE-2025-6853CVE-2025-6853

Description

A vulnerability classified as critical has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This affects the function upload_temp_docs of the file /knowledge_base/upload_temp_docs of the component Backend. The manipulation of the argument flag leads to path traversal. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.48% probability of exploitation · percentile 37.7% · 2026-06-19T12:03:05Z
Published2025-06-29
Last modified2026-04-29

Underlying weaknesses· 1

CWE-22

References

  1. https://github.com/chatchat-space/Langchain-Chatchat/issues/5352
  2. https://vuldb.com/?ctiid.314325
  3. https://vuldb.com/?id.314325
  4. https://vuldb.com/?submit.601155
  5. https://github.com/chatchat-space/Langchain-Chatchat/issues/5352

1

TypeTargetConfidenceTier
WeaknessImproper Limitation of a Pathname to a Restricted Directory ('Path Traversal')cwe-220%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.