GHSA-wmvv-fhm6-w34x: langchain-chatchat (CVE-2026-7845)

Package	Ecosystem	Affected	Fixed in
langchain-chatchat	PyPI	<=0.3.1.3	No fixed version yet

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Langchain-Chatchat up to and including 0.3.1.3 has a weakness involving use of a weak hash in its Vision Chat paste image handler. An attacker would need to be on the local network, and the source describes the attack as high complexity and difficult to exploit, with a published exploit. No fixed version is listed, and the source gives few details on the impact.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
2.1	Low	4.0	CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P	CNA (VulDB)

CISA KEV Not listed.
EPSS 0.0014, the 3rd percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 15:00 UTC First seen by agentprime
31 Oct 2026, 15:00 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.