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PatchSiren cyber security CVE debrief

CVE-2026-42271 BerriAI CVE debrief

A command injection vulnerability exists in BerriAI LiteLLM, posing significant risks to affected systems. The vulnerability, tracked as CVE-2026-42271, has been publicly disclosed and added to the CISA Known Exploited Vulnerabilities catalog. This vulnerability affects systems using BerriAI LiteLLM, allowing attackers to inject malicious commands. Defenders and security teams must assess exposure and prioritize remediation to prevent potential command injection and unauthorized access.

Vendor
BerriAI
Product
LiteLLM
CVSS
HIGH 8.7
CISA KEV
Listed
Original CVE published
2026-06-08
Original CVE updated
2026-06-08
Advisory published
2026-06-08
Advisory updated
2026-06-08

Who should care

Defenders and security teams responsible for open-source components, cloud services, and systems using BerriAI LiteLLM should assess exposure and prioritize remediation.

Why it matters

CVE-2026-42271 is a high-severity command injection vulnerability in BerriAI LiteLLM, known to be exploited in the wild. Defenders should prioritize remediation, especially for systems using this component.

  • Potential command injection and unauthorized access
  • Possible disruption of services using affected systems
  • Need for urgent patching or mitigation
  • Potential data breaches or integrity issues

Technical summary

The CVE-2026-42271 vulnerability is a command injection issue in BerriAI LiteLLM, a common open-source component used in various systems. The vulnerability has been publicly disclosed and added to the CISA Known Exploited Vulnerabilities catalog. It allows attackers to inject malicious commands, potentially leading to unauthorized access and disruption of services. Defenders should prioritize remediation, especially for systems using this component, and follow applicable guidance for cloud services.

Defensive priority

High priority remediation is recommended as the vulnerability is known to be exploited in the wild and affects a common open-source component.

Recommended defensive actions

  • Apply mitigations per vendor instructions
  • Follow applicable BOD 22-01 guidance for cloud services
  • Discontinue use of the product if mitigations are unavailable

Evidence notes

The vulnerability is described as a command injection issue in BerriAI LiteLLM. The CISA Known Exploited Vulnerabilities catalog and CVE Program record provide official details.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-42271 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-42271

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-42271 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-42271

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.