Critical severity · published Oct 20, 2026
CVE-2026-75128
Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LA
Langchain-Chatchat · chatchat-space
through 0.3.1.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-75128
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-75128
github.com
https://github.com/chatchat-space/Langchain-Chatchat/blob/a6a9193b5002061719f0eee62c6310bd5b1b7f63/libs/chatchat-server/chatchat/server/api_server/tool_routes.py#L33
www.lasso.security
https://www.lasso.security/vulnerability-database/cve-2026-75128
www.vulncheck.com
https://www.vulncheck.com/advisories/langchain-chatchat-through-0.3.1.3-unauthenticated-rce-via-tools-call-endpoint
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