CVE-2026-42271
BerriAI LiteLLM Command Injection Vulnerability
CVSS
8.8
High
EPSS
80.2%
p100
KEV
YES
Jun 8, 2026
Exploit Today
80
0-100
Published: May 8, 2026 · Last modified: Jul 15, 2026 · CWE-77 · CWE-78
Product
BerriAI / LiteLLM
Vulnerability
BerriAI LiteLLM Command Injection Vulnerability
Added to KEV
Jun 8, 2026
Remediate by
Jun 22, 2026
Known ransomware use
No
Summary description
BerriAI LiteLLM contains a command injection vulnerability that could allow any authenticated user, including holders of low-privilege internal-user keys, to run arbitrary commands on the host.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://github.com/BerriAI/litellm/security/advisories/GHSA-v4p8-mg3p-g94g ; https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable ; https://nvd.nist.gov/vuln/detail/CVE-2026-42271
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.
- github.comhttps://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable
- github.comhttps://github.com/BerriAI/litellm/security/advisories/GHSA-v4p8-mg3p-g94g
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:27784
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:28960
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:30056
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-42271
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2467924
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42271.json
- www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42271