CVE-2026-75128: Langchain-Chatchat unauthenticated tool call endpoint allows arbitrary OS command execution
Langchain-Chatchat
Langchain-Chatchat through version 0.3.1.3 exposes an unauthenticated POST endpoint that lets remote attackers invoke registered tools including a shell tool. This flaw allows arbitrary OS command execution as the server user.
disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why
- CVSS
- 9.8
- EPSS
- 0.02 · top 17% · 2026-11-13
- fix status
- Fix status unknown
- first report
- 20 Oct 2026
- last update
- 20 Oct 2026
- CVE ids
Timeline · 1
Sources · 1
Advisories and databases
- 2026-10-20CVE-2026-75128: Langchain-Chatchat through 0.3.1.3 exposes a POST /tools/call API endpoint that invokes any registered tool by name without…NVD · nvd.nist.gov/vuln/detail/CVE-2026-75128
Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.
Classification
- lane
- Patch now
- AI role
- Attack on AI
- categories
- Infrastructure vulnerability
- severity
- 2 · Disclosed vulnerability
- fix status
- Fix status unknown
- targets
- Framework / tooling
- owasp llm top 10
- LLM03:2025 Supply Chain
- mitre atlas
- no technique for these categories
- dates
- happened 20 Oct 2026 · first reported 20 Oct 2026
- origin
- NVDVulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
- record
- confidence 0.95 · created 2026-10-20 04:59Z · updated 2026-10-20 04:59Z
Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned
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the brief as text
# CVE-2026-75128: Langchain-Chatchat unauthenticated tool call endpoint allows arbitrary OS command execution https://gcdradar.vercel.app/incidents/cve-2026-75128-langchain-chatchat-unauthenticated-tool-call · AIR-2026-1426 · closed 2026-10-20 - Lane: Patch now - Severity: 2 (Disclosed vulnerability) - Fix status: Fix status unknown - First reported: 2026-10-20 - AI role: Attack on AI - Products: Langchain-Chatchat - CVE ids: CVE-2026-75128 - CVSS: 9.8 ## Summary Langchain-Chatchat through version 0.3.1.3 exposes an unauthenticated POST endpoint that lets remote attackers invoke registered tools including a shell tool. This flaw allows arbitrary OS command execution as the server user. ## What to do No action recorded; read the sources below and the vendor's advisory. ## Latest updates - 2026-10-20: CVE-2026-75128: Langchain-Chatchat through 0.3.1.3 exposes a POST /tools/call API endpoint that invokes any registered tool by name without… (https://nvd.nist.gov/vuln/detail/CVE-2026-75128) ## Sources - 2026-10-20 NVD: CVE-2026-75128: Langchain-Chatchat through 0.3.1.3 exposes a POST /tools/call API endpoint that invokes any registered tool by name without… https://nvd.nist.gov/vuln/detail/CVE-2026-75128 Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.
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Patch now · Disclosed · since 5 May 2026 · CVE-2026-7846
AI - closed6.3Langchain-Chatchat CVE-2026-7844: Missing authentication in Langchain-Chatchat file service
Patch now · Disclosed · since 5 May 2026 · CVE-2026-7844
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Patch now · Disclosed · since 5 May 2026 · CVE-2026-7845
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