Read the docs
TI-2026-27233 Aliases CVE-2026-35030GHSA-jjhc-v7c2-5hh6

LiteLLM has an authentication bypass via OIDC userinfo cache key collision

Priority MEDIUM 49CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Partial Red Hat: 3 fixed, 3 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-287.

Summary

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.0, when JWT authentication is enabled (enable_jwt_auth: true), the OIDC userinfo cache uses token[:20] as the cache key. JWT headers produced by the same signing algorithm generate identical first 20 characters. This configuration option is not enabled by default. Most instances are not affected. An unauthenticated attacker can craft a token whose first 20 characters match a legitimate user's cached token. On cache hit, the attacker inherits the legitimate user's identity and permissions. This affects deployments with JWT/OIDC authentication enabled. Fixed in v1.83.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00636 50th percentileScored 2026-11-07
Fix Partial litellm (BerriAI): 1.83.0litellm (PyPI): 1.83.0Red Hat: 3 advisoriesRed Hat: 3 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
BerriAIlitellmbefore 1.83.01.83.0Patch availableCNA
—litellm (PyPI)before 1.83.01.83.0Patch availableGHSA-jjhc-v7c2-5hh6
  • litellm VendorBerriAI Affected before 1.83.0 Fixed in 1.83.0 Patch available CNA
  • litellm (PyPI) Vendor— Affected before 1.83.0 Fixed in 1.83.0 Patch available GHSA-jjhc-v7c2-5hh6

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:*before 1.83.0VulnerableBerriAI
  • cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:* Versions before 1.83.0 Vulnerable ·BerriAI

Remediation

  • Fix · CNA litellm (BerriAI) Fixed in 1.83.0
  • Fix · GHSA-jjhc-v7c2-5hh6 litellm (PyPI) Fixed in 1.83.0 Advisory →

Red Hat 3 advisories

  • RHSA-2026:30056 Released 2026-06-25 · Red Hat rating Important
    RHOAI 3.3.4 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 3.3 registry.redhat.io/rhoai/odh-llama-stack-core-rhel9
  • RHSA-2026:28960 Released 2026-06-24 · Red Hat rating Important
    RHOAI 2.25.8 - Red Hat OpenShift AI
    • Red Hat OpenShift AI 2.25 registry.redhat.io/rhoai/odh-llama-stack-core-rhel9
  • RHSA-2026:13545 Released 2026-05-04 · Red Hat rating Important
    Red Hat Ansible Automation Platform 2.6 Container Release Update
    • Red Hat Ansible Automation Platform 2.6 registry.redhat.io/ansible-automation-platform-26/ansible-dev-tools-rhel9, registry.redhat.io/ansible-automation-platform-26/controller-rhel9, registry.redhat.io/ansible-automation-platform-26/eda-controller-rhel9 +11

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Lightspeed CoreAffectedNo fix yet
Red Hat Ansible Automation Platform 2AffectedNo fix yet
Red Hat OpenShift AI (RHOAI)AffectedNo fix yet
Red Hat Ansible Automation Platform 2.6Fixed RHSA-2026:13545
Red Hat OpenShift AI 2.25Fixed RHSA-2026:28960
Red Hat OpenShift AI 3.3Fixed RHSA-2026:30056
Not affected: 3 products
  • Red Hat Ansible Automation Platform 2.6
  • Red Hat OpenShift AI 2.25
  • Red Hat OpenShift AI 3.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-35030
  2. 2026-10-03 Alias added: GHSA-jjhc-v7c2-5hh6
  3. 2026-10-25 EPSS moved to the below the 50th percentile
  4. 2026-10-31 EPSS moved to the 50th–90th percentile
  5. 2026-11-01 EPSS moved to the below the 50th percentile
  6. 2026-11-03 EPSS moved to the 50th–90th percentile
  7. 2026-11-05 Affected versions changed · Red Hat
  8. 2026-11-08 Affected versions changed · Red Hat

References

Advisory 2

Other 1

  • TI-2026-26015 Trivy ecosystem supply chain briefly compromised KEVCVSS 4.0CRITICAL 9.4
  • TI-2026-30529 LiteLLM: SQL injection in Proxy API key verification KEVCVSS 4.0CRITICAL 9.3
  • TI-2026-30582 LiteLLM: Authenticated command execution via MCP stdio test endpoints KEVCVSS 4.0HIGH 8.7
  • TI-2026-42639 LiteLLM: MCP Authentication Bypass via OAuth2 Passthrough Fallback KEVCVSS 4.0HIGH 8.8
  • TI-2024-05340 Remote Code Execution in BerriAI/litellm CVSS 3.1CRITICAL 9.8
  • TI-2024-02760 Server-Side Template Injection in BerriAI/litellm CVSS 3.0CRITICAL 9.8
See all 36 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences