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Vulnerabilities

Vulnerability · CVE-2026-42271

BerriAI LiteLLM Command Injection Vulnerability

Published May 7, 2026 · catalog updated Jul 15, 2026 · BerriAI LiteLLM

Patch now

CVE-2026-42271 is in the CISA known-exploited catalog, due Jun 22, 2026. Confirm BerriAI LiteLLM against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
High8.7
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
92.57%
Remediation
Remediation guidance
Affected products
cpe litellm/litellm · cpe redhat/openshift ai · vendor BerriAI LiteLLM

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe litellm/litellmversion unspecified
  • cpe redhat/openshift ai3.4
  • vendor BerriAI LiteLLMversion unspecified

How to fix CVE-2026-42271

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-42271 is in the CISA known-exploited catalog, due Jun 22, 2026. Confirm BerriAI LiteLLM against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with redhat/openshift ai 3.4. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-77: Command Injection; CWE-78: OS Command Injection. EPSS 92.57%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 7, 2026 · Catalog

    Detected

    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 c

  2. Jun 8, 2026 · CISA KEV

    Known exploited

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  3. Jun 22, 2026 · CISA KEV

    Remediation due

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  4. Jul 14, 2026 · Catalog

    Updated

    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 c

  5. Jul 15, 2026 · NIST NVD

    Updated

    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 c

Sources

  • CISA KEVConfirmed exploitationCVE-2026-42271

    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.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2026-42271

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-42271

    30-day exploitation probability 92.6%

    first.org
  • Metasploit ModulesPublic exploit moduleexploit_multi/http/litellm_mcp_test_cmd_injection

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-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 s

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2026-42271

    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.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.