Auth bypass in Berriai Litellm
CVE-2026-12773
A weakness has been identified in BerriAI litellm up to 1.59.8. Affected is the function UserAPIKeyAuth of the file litellm/proxy/_experimental/mcp_server/auth/user_api_key_auth_mcp.py of the component MCP Proxy. Executing a manipulation c…
Vulnerability class: Broken Authentication
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Berriai Litellm — versions 1.59.0, 1.59.1, 1.59.2
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (exploit)
Frequently asked questions
- What is CVE-2026-12773?
- CVE-2026-12773 is a high-severity vulnerability in Berriai Litellm, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-06-21.
- How severe is CVE-2026-12773?
- High severity. CVSS v3 base score is 7.3 out of 10.