PT-2025-27356 · Unknown · Langchain-Chatchat

Published 2025-06-29 · Updated 2025-06-29 · CVE-2025-6855

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: chatchat-space Langchain-Chatchat versions up to 0.3.1

Description: A critical issue has been found in the processing of the file "/v1/file". The manipulation of the flag argument leads to path traversal. The exploit has been disclosed to the public and may be used.

Recommendations: For versions up to 0.3.1, consider restricting access to the "/v1/file" endpoint to minimize the risk of exploitation. As a temporary workaround, avoid using the flag argument in the affected endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2025-6855

GHSA-F823-PHMG-X5FR

Affected Products

Langchain-Chatchat

References · 11

• 🔥 https://github.com/chatchat-space/Langchain-Chatchat/issues/5354 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-6855 · Security Note
• https://osv.dev/vulnerability/GHSA-f823-phmg-x5fr · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-6855 · Vendor Advisory
• https://github.com/chatchat-space/Langchain-Chatchat · Note
• https://vuldb.com/?submit.601162 · Note
• https://t.me/cvetracker/27354 · Telegram Post
• https://vuldb.com/?id.314327 · Note
• https://twitter.com/CVEnew/status/1939251444039000427 · Twitter Post
• https://vuldb.com/?ctiid.314327 · Note
• https://t.me/cvenotify/127016 · Telegram Post