CVE-2026-12773
BerriAI litellm MCP Proxy user_api_key_auth_mcp.py UserAPIKeyAuth improper authentication
MEDIUM 6.9
En bref
- Source
- NVD
- EPSS
- EPSS 1.02 % · centile 63 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- VulDB
- Statut NVD
- Modified
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.
Faiblesses (CWE)
- CWE-287 — Authentification incorrecte
- CWE-303 — Implémentation incorrecte de l'algorithme d'authentification
Références
- https://vuldb.com/vuln/372515
- https://vuldb.com/vuln/372515/cti
- https://vuldb.com/cve/CVE-2026-12773
- https://vuldb.com/submit/811282
- https://gist.github.com/YLChen-007/3cfaad10a69d7a15e4d4d458cb53309e
- 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
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 4.0 | MEDIUM 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| CVSS 3.0 | HIGH 7.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| CVSS 2.0 | HIGH 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L | redhat-SADP |
| CVSS 4.0 | MEDIUM 5.5 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · cna@vuldb.com (Secondary) |
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L | NVD · cna@vuldb.com (Secondary) |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | HIGH 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
| CVSS 2.0 | HIGH 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P | NVD · cna@vuldb.com (Secondary) |
Avis
- GHSA-4jcj-7x88-m979 — LiteLLM: MCP Proxy Has Improper Authentication
- PYSEC-2026-4067 — LiteLLM: MCP Proxy Has Improper Authentication
Références européennes
- ENISA EUVD · EUVD-2026-38139
- GCVE · GCVE-0-2026-12773
Configurations affectées (CPE NVD)
cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:*< 1.59.9
Produits affectés
| Produit | Versions |
|---|---|
| BerriAI · litellm | affected 1.59.0 ; affected 1.59.1 ; affected 1.59.2 ; affected 1.59.3 ; affected 1.59.4 ; affected 1.59.5 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |