CVE-2026-51883

Affects: LangChain

CVSS: CRITICAL · 9.1v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published: 2026-10-01
Weakness: CWE-22
Source: nvd.nist.gov/vuln/detail/CVE-2026-51883

Description

The knowledge base creation and document upload interfaces in Langchain-Chatchat 0.3.0;0.3.1 is vulnerable to path traversal. An attacker can inject path traversal sequences (such as ..\) into the knowledge_base_name parameter to write knowledge base content to arbitrary locations outside the configured knowledge base root directory.

References

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