Critical 9.8Published Oct 19, 2026

CVE-2026-75128Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint

Updated under an hour ago (Oct 26, 2026, 9:50 PM ET)

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It affects chatchat-space Langchain-Chatchat. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.63%, higher than 50% of scored CVEs.

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Every CVE for chatchat-space Langchain-Chatchat

Exploited in the last 30 days

Langchain-Chatchat through 0.3.1.3 exposes a POST /tools/call API endpoint that invokes any registered tool by name without authentication, leaving the always-registered shell tool callable. Remote attackers can send a single request naming the shell tool to execute arbitrary OS commands as the server user (root in the shipped Docker image).

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-306
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.63% (percentile 50)
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Oct 20, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

chatchat-space Langchain-Chatchat chatchat_space:langchain_chatchat (from the name)	through 0.3.1.3	CNA record

References

References

https://www.lasso.security/vulnerability-database/cve-2026-75128	technical-description, exploit
https://github.com/chatchat-space/Langchain-Chatchat/blob/a6a9193b5002061719f0eee62c6310bd5b1b7f63/libs/chatchat-server/chatchat/server/api_server/tool_routes.py#L33	technical-description
https://www.vulncheck.com/advisories/langchain-chatchat-through-0.3.1.3-unauthenticated-rce-via-tools-call-endpoint	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.