Unrated severityNVD Advisory· Published Oct 1, 2026

CVE-2026-51882

Description

The OpenAI-compatible file upload endpoint /v1/files in Langchain-Chatchat 0.3.0 is vulnerable to path traversal. An attacker can write files to arbitrary locations outside the openai_files directory by crafting malicious filenames.

Affected products

Chatchat Space/Langchain Chatchatllm-fuzzy
Range: =0.3.0
Langchain AI/Langchainllm-fuzzy
Range: =0.3.0

Patches

Vulnerability mechanics

References

gist.github.com/Ro1ME/f80ac458836b59adb9c6ceff3993f7f3nvd
github.com/chatchat-space/Langchain-Chatchat/issues/5468nvd

News mentions

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