High severity7.3NVD Advisory· Published Jun 21, 2026· Updated Jul 15, 2026
CVE-2026-12773
CVE-2026-12773
Description
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 can lead to improper authentication. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
litellmPyPI | < 1.84.0 | 1.84.0 |
Affected products
2Patches
Vulnerability mechanics
References
11- gist.github.com/YLChen-007/3cfaad10a69d7a15e4d4d458cb53309envdExploitThird Party AdvisoryWEB
- vuldb.com/submit/811282nvdExploitThird Party AdvisoryVDB EntryWEB
- github.com/advisories/GHSA-4jcj-7x88-m979ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-12773ghsaADVISORY
- vuldb.com/cve/CVE-2026-12773nvdThird Party AdvisoryVDB EntryWEB
- vuldb.com/vuln/372515nvdThird Party AdvisoryVDB EntryWEB
- access.redhat.com/security/cve/CVE-2026-12773nvdWEB
- bugzilla.redhat.com/show_bug.cginvdWEB
- github.com/BerriAI/litellm/commit/73869f0faf7d11ee21adcb5f91b8c33a340b6c2cghsaWEB
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12773.jsonnvdWEB
- vuldb.com/vuln/372515/ctinvdPermissions RequiredVDB EntryWEB
News mentions
1- Litellm: Ten Vulnerabilities Including Auth Bypass and SSRF Disclosed TogetherVypr Intelligence · Jun 21, 2026