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.
References
| Link | Resource |
|---|---|
| https://gist.github.com/YLChen-007/3cfaad10a69d7a15e4d4d458cb53309e | Exploit Third Party Advisory |
| https://vuldb.com/cve/CVE-2026-12773 | Third Party Advisory VDB Entry |
| https://vuldb.com/submit/811282 | Exploit Third Party Advisory VDB Entry |
| https://vuldb.com/vuln/372515 | Third Party Advisory VDB Entry |
| https://vuldb.com/vuln/372515/cti | Permissions Required VDB Entry |
| https://access.redhat.com/security/cve/CVE-2026-12773 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2491112 | |
| https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12773.json | |
| https://vuldb.com/submit/811282 | Exploit Third Party Advisory VDB Entry |
Configurations
History
30 Jun 2026, 03:17
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-303 | |
| References |
|
|
| References | () https://vuldb.com/submit/811282 - Exploit, Third Party Advisory, VDB Entry |
24 Jun 2026, 20:27
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Litellm
Litellm litellm |
|
| CPE | cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:* | |
| References | () https://gist.github.com/YLChen-007/3cfaad10a69d7a15e4d4d458cb53309e - Exploit, Third Party Advisory | |
| References | () https://vuldb.com/cve/CVE-2026-12773 - Third Party Advisory, VDB Entry | |
| References | () https://vuldb.com/submit/811282 - Third Party Advisory, Exploit, VDB Entry | |
| References | () https://vuldb.com/vuln/372515 - Third Party Advisory, VDB Entry | |
| References | () https://vuldb.com/vuln/372515/cti - Permissions Required, VDB Entry |
22 Jun 2026, 19:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://vuldb.com/submit/811282 - |
21 Jun 2026, 04:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-21 04:16
Updated : 2026-07-15 02:18
NVD link : CVE-2026-12773
Mitre link : CVE-2026-12773
CVE.ORG link : CVE-2026-12773
JSON object : View
Products Affected
litellm
- litellm
