BerriAI LiteLLM Command Injection (CVE-2026-42271)

Historical catalog analysis: CISA added this entry on June 08, 2026. The entry reflects catalog information retrieved on August 31, 2026, not a snapshot archived on the inclusion date. Check current vendor guidance before acting.

What the vulnerability is

CVE-2026-42271 is a command injection vulnerability (CWE-78, CWE-77) identified in BerriAI LiteLLM. The flaw allows an authenticated user to execute arbitrary commands on the host system where the application is running. Notably, this risk extends to users holding low-privilege internal-user keys, meaning that authentication does not serve as a sufficient boundary against exploitation.

Exposure and applicability

This vulnerability affects organizations utilizing BerriAI LiteLLM as an AI proxy or gateway. Because LiteLLM is often deployed as a central hub for managing multiple LLM APIs, the host system may have access to sensitive environment variables, API keys, and internal network segments. The exposure is particularly high in environments where low-privilege keys are widely distributed to internal users or automated services.

Remediation priorities

Based on our analysis of the available data, defenders should prioritize the following actions:

1. Update Deployment: Transition affected instances to version v1.83.7-stable or apply vendor-supplied mitigations. This is the primary method for reducing the initial attack surface.
2. Privilege Review: Audit the distribution of internal-user keys. Since low-privilege keys can be leveraged for command execution, limiting key issuance reduces the number of potential entry points.
3. Environment Isolation: For organizations unable to patch immediately, we recommend isolating the LiteLLM host using containerization or virtual machines with minimal privileges to limit the impact of a successful injection.

How to validate remediation

Verification must go beyond confirming the version number. While updating to v1.83.7-stable is the reported corrective action, vulnerability management teams should verify the result through the following methods:

• Configuration Audit: Confirm that the updated binary or image is actively running in production and that no legacy, vulnerable versions remain in the environment.
• Permission Validation: Verify that the service account running LiteLLM operates under a non-privileged user (least privilege) to ensure that any residual risk of command execution is constrained by the OS-level permissions.

Limits and open questions

A version check alone does not prove that the deployment is secure, as environment-specific configurations may introduce additional risks. It remains unknown whether this vulnerability has been leveraged in active ransomware campaigns. Furthermore, while CISA has established a remediation deadline of 2026-06-22 for federal agencies, non-federal organizations must determine their own priority based on their specific exposure and risk tolerance.

Source and editorial note

CVE-2026-42271: BerriAI LiteLLM Command Injection Vulnerability · Source date: June 08, 2026 · Retrieved August 31, 2026.

Material facts are tied to the cited primary source. Recommendations are independent defensive analysis unless attributed to the source. Confirm consequential decisions against current authoritative guidance.

Archive date: June 11, 2026. The displayed post date is assigned three days after the source date to organize this retrospective archive; it does not mean this site published the analysis then. First published by this site: September 09, 2026 at 01:43 UTC.

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