CVE-2026-42271
⚡ CISA KEVPublished: 2026-05-08Modified: 2026-07-15Vendor: BerriAIProduct: LiteLLM
8.8
CVSS v3
83.6%
EPSS
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
⚡ Added to KEV on 2026-06-08 · Federal agencies must remediate by 2026-06-22
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.74.2 to before version 1.83.7, two endpoints used to preview an MCP server before saving it — POST /mcp-rest/test/connection and POST /mcp-rest/test/tools/list — accepted a full server configuration in the request body, including the command, args, and env fields used by the stdio transport. When called with a stdio configuration, the endpoints attempted to connect, which spawned the supplied command as a subprocess on the proxy host with the privileges of the proxy process. The endpoints were gated only by a valid proxy API key, with no role check. Any authenticated user — including holders of low-privilege internal-user keys — could therefore run arbitrary commands on the host. This issue has been patched in version 1.83.7.
💣 Public Exploits0
From Exploit-DB
No public exploits in Exploit-DB.
🔍 Sigma Detection Rules0
Rules tagged with this CVE
No Sigma rules tagged with this CVE.
🛠️ Patch Details1
Affected/fixed versions from threat intel reports
| LiteLLM | — | — | source ↗ |
📰 Threat Intel Coverage1
Digest reports mentioning this CVE
📎 References9
↗ https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable↗ https://github.com/BerriAI/litellm/security/advisories/GHSA-v4p8-mg3p-g94g↗ https://access.redhat.com/errata/RHSA-2026:27784↗ https://access.redhat.com/errata/RHSA-2026:28960↗ https://access.redhat.com/errata/RHSA-2026:30056↗ https://access.redhat.com/security/cve/CVE-2026-42271↗ https://bugzilla.redhat.com/show_bug.cgi?id=2467924↗ https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42271.json↗ https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42271