CVE-2025-6855: chatchat-space Langchain-Chatchat file path traversal

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-06-29 · updated 2026-06-17
Weakness: CWE-22

Description

A vulnerability, which was classified as critical, has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This issue affects some unknown processing of the file /v1/file. The manipulation of the argument flag leads to path traversal. The exploit has been disclosed to the public and may be used.

Affected products

chatchat-space Langchain-Chatchat: through 0.3.1

References

https://github.com/chatchat-space/Langchain-Chatchat/issues/5354
https://vuldb.com/?ctiid.314327
https://vuldb.com/?id.314327
https://vuldb.com/?submit.601162

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