Reference implementation Data compiled from public sources as of 2026-10-26. Not an assessment, certification or recommendation. Confirm current status with the vendor and the issuing body.
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CVEs / CVE-2026-51884

Agent framework

CVE-2026-51884

Critical · CVSS 3.1 9.8 Path traversal

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.

Official record (CVE.org) NVD Export JSON Report a wrong listing

Affected products · 1

ProductVersions affectedFixed in
LangChain not stated by CPE —

Versions as NVD's CPE configuration states them; "—" means the record gives no fixed version, not that none exists. Check the vendor's advisory in the references.

In this registry

References · 2

The official record's references, as NVD lists them, minus any tagged Exploit. Nothing here is an exploit or a proof of concept.

Description, scores, versions and references are the official CVE record's own, retrieved 2026-10-25 from NVD. Category, attack surface and cross-links are this registry's classification and can be wrong — use the button above. Not a severity assessment for your deployment.