THREAT WATCH
High Microsoft Active Directory Federation Services: CVE-2026-56155 — Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability Medium Microsoft SharePoint Server: CVE-2026-56164 — Microsoft SharePoint Server Missing Authentication for Critical Function Vulnerability Actively Exploited SonicWall SMA1000 Appliances: CVE-2026-15409 — SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability Actively Exploited SonicWall SMA1000 Appliances: CVE-2026-15410 — SonicWall SMA1000 Appliances Code Injection Vulnerability Medium Cisco IOS: CVE-2008-4128 — Cisco IOS Cross-Site Request Forgery Vulnerability Critical Balbooa Forms: CVE-2026-56291 — Balbooa Forms Unrestricted Upload of File with Dangerous Type Vulnerability Critical iCagenda iCagenda: CVE-2026-48939 — iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability Critical Joomlack Page Builder: CVE-2026-56290 — Joomlack Page Builder Improper Access Control Vulnerability High Microsoft Active Directory Federation Services: CVE-2026-56155 — Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability Medium Microsoft SharePoint Server: CVE-2026-56164 — Microsoft SharePoint Server Missing Authentication for Critical Function Vulnerability Actively Exploited SonicWall SMA1000 Appliances: CVE-2026-15409 — SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability Actively Exploited SonicWall SMA1000 Appliances: CVE-2026-15410 — SonicWall SMA1000 Appliances Code Injection Vulnerability Medium Cisco IOS: CVE-2008-4128 — Cisco IOS Cross-Site Request Forgery Vulnerability Critical Balbooa Forms: CVE-2026-56291 — Balbooa Forms Unrestricted Upload of File with Dangerous Type Vulnerability Critical iCagenda iCagenda: CVE-2026-48939 — iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability Critical Joomlack Page Builder: CVE-2026-56290 — Joomlack Page Builder Improper Access Control Vulnerability

CVE-2026-42271 — BerriAI LiteLLM Command Injection Vulnerability

Cyber Dilmeth - Simplifying Cybersecurity for Everyone > Threat Intel > CVE-2026-42271 — BerriAI LiteLLM Command Injection Vulnerability
  • Posted onJune 8, 2026
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High CVSS 8.8 Actively exploited · CISA KEV

BerriAI LiteLLM

CVE-2026-42271 Added Jun 8, 2026 Remediation deadline has passed
TL;DR

BerriAI LiteLLM is affected by a high-severity vulnerability (CVE-2026-42271) that is confirmed to be actively exploited in the wild. 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 is this vulnerability?

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.

How it works

This is classified as CWE-77. In plain terms, an attacker could use this flaw in LiteLLM to gain access, disrupt service, or steal data — the exact impact depends on how it’s deployed in your environment.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Mitigations

  • Apply the vendor’s security patch or update as soon as it’s available and tested.
  • If no patch exists yet, apply the vendor’s temporary workaround.
  • Limit network exposure of the affected system until it’s patched.
  • Review logs for signs of prior exploitation, especially if it’s flagged for ransomware use.

Recommendations

  • Confirm whether BerriAI LiteLLM is used anywhere in your environment.
  • Patch internet-facing systems first, then internal ones.
  • Set a reminder ahead of the remediation deadline so it doesn’t slip.
  • Subscribe to the vendor’s security advisories for earlier warning next time.

Compiled from public threat intelligence (CISA Known Exploited Vulnerabilities catalog and the National Vulnerability Database, referenced in 9 public advisories).