All vulnerabilities
CVE-2026-59822GHSA-7488-6r32-c95qPYSEC-2026-3479

BerriAI LiteLLM Improper Authentication Vulnerability

BerriAI LiteLLMPyPILibraries & packages
Open in ThreatlineRecord JSON
CVSS
8.8High
ExploitationExploited in the wildAdded to KEV 2 Sep 2026CISA KEV
Exploit odds (EPSS)0.84%Chance of exploitation activity in the next 30 days, higher than 57% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.84.0Fixed versionOSV
Federal deadline16 Sep 2026Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. CISA KEV

What fixes it

  • 1.84.0litellm, PyPIOSVpip install "litellm>=1.84.0"

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 8 Jul 2026, 19:32 UTCPublishedCVE List
  2. 2 Sep 2026Added to CISA KEVCISA KEV

Description

BerriAI LiteLLM contains an improper authentication vulnerability in the MCP Streamable HTTP endpoint that could allow an unauthenticated attacker to establish an authenticated MCP session using an arbitrary Bearer token.

Text from CVE List

Affected versions 53

  • litellmaffected: < 1.84.0CVE List
  • litellm, pip< 1.84.0GitHub
  • litellm, PyPIfrom first release, fixed in 1.84.0OSV
  • litellm, PyPI0.1.0OSV
  • litellm, PyPI0.1.1OSV
  • litellm, PyPI0.1.2OSV
  • litellm, PyPI0.1.201OSV
  • litellm, PyPI0.1.202OSV
  • litellm, PyPI0.1.203OSV
  • litellm, PyPI0.1.204OSV
  • litellm, PyPI0.1.205OSV
  • litellm, PyPI0.1.206OSV
  • litellm, PyPI0.1.207OSV
  • litellm, PyPI0.1.208OSV
  • litellm, PyPI0.1.209OSV
  • litellm, PyPI0.1.210OSV
  • litellm, PyPI0.1.211OSV
  • litellm, PyPI0.1.212OSV
  • litellm, PyPI0.1.213OSV
  • litellm, PyPI0.1.214OSV
  • litellm, PyPI0.1.215OSV
  • litellm, PyPI0.1.216OSV
  • litellm, PyPI0.1.217OSV
  • litellm, PyPI0.1.218OSV
  • litellm, PyPI0.1.219OSV
  • litellm, PyPI0.1.220OSV
  • litellm, PyPI0.1.221OSV
  • litellm, PyPI0.1.222OSV
  • litellm, PyPI0.1.223OSV
  • litellm, PyPI0.1.224OSV
  • litellm, PyPI0.1.225OSV
  • litellm, PyPI0.1.226OSV
  • litellm, PyPI0.1.227OSV
  • litellm, PyPI0.1.228OSV
  • litellm, PyPI0.1.229OSV
  • litellm, PyPI0.1.2291OSV
  • litellm, PyPI0.1.230OSV
  • litellm, PyPI0.1.231OSV
  • litellm, PyPI0.1.232OSV
  • litellm, PyPI0.1.233OSV
  • litellm, PyPI0.1.234OSV
  • litellm, PyPI0.1.235OSV
  • litellm, PyPI0.1.236OSV
  • litellm, PyPI0.1.237OSV
  • litellm, PyPI0.1.238OSV
  • litellm, PyPI0.1.3OSV
  • litellm, PyPI0.1.31OSV
  • litellm, PyPI0.1.32OSV
  • litellm, PyPI0.1.330OSV
  • litellm, PyPI0.1.331OSV
  • litellm, PyPI0.1.34OSV
  • litellm, PyPI0.1.341OSV
  • litellm, PyPI0.1.343OSV

References 7