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2 IOCs

LiteLLM RCE Vulnerability Exploited in the Wild to Run Commands

Cyber Press
Cyber Press
Published June 9, 2026Original Report

Excerpt

Threat actors are actively exploiting a critical unauthenticated remote code execution (RCE) vulnerability in LiteLLM, a widely used open-source AI proxy gateway, by chaining two CVEs to fully bypass authentication and execute arbitrary commands on vulnerable hosts. Horizon3.ai researchers confirmed the chained exploitation path on June 1, 2026, revealing that CVE-2026-42271, a command injection flaw in LiteLLM’s MCP server test endpoints, can be combined with…

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Attack Flow4 steps · MITRE ATT&CK mapped

Initial AccessTA0001T1190
1/4
Exploit Public-Facing Application
ActionBypass authentication
Attackers exploit CVE-2026-48710 (Starlette Host Header bypass) to bypass authentication on LiteLLM.

Indicators of Compromise

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2 indicators

TypeIndicatorConfidenceScoreFirst Seen
CVECVE-2026-42271HighScore 66/100First seen
CVECVE-2026-48710MediumScore 59/100First seen

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