What’s Vulnerable › Vulnerabilities

CVE-2026-51884

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-01 · updated 2026-10-05
• Weakness: CWE-22

Description

The /knowledge_base/upload_temp_docs temporary document upload endpoint in Langchain Chatchat 0.3.1 is vulnerable to path traversal. By crafting malicious filenames, an attacker can write files to arbitrary locations on the server, bypassing the intended restrictions on the temporary directory.

References

• https://gist.github.com/Ro1ME/da028c9ce13dd888e265b9bef01d6eca
• https://github.com/chatchat-space/Langchain-Chatchat/issues/5466
• https://github.com/chatchat-space/Langchain-Chatchat/issues/5466

Get alerted when CVE-2026-51884 or the next vulnerability affects your stack