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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
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.
Metrics
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[{"vendor":"Red Hat","product":"Red Hat Ansible Automation Platform 2.6","defaultStatus":"affected","cpes":["cpe:/a:redhat:ansible_automation_platform:2.6::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI 2.25","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_ai:2.25::el9"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI 3.3","defaultStatus":"affected","cpes":["cpe:/a:redhat:openshift_ai:3.3::el9"]},{"vendor":"Red Hat","product":"Lightspeed Core","defaultStatus":"affected","cpes":["cpe:/a:redhat:lightspeed_core"]},{"vendor":"Red Hat","product":"Red Hat OpenShift AI (RHOAI)","defaultStatus":"unaffected","cpes":["cpe:/a:redhat:openshift_ai"]}]
New CVE Received from GitHub, Inc.4/06/2026 1:17:12 PM
Action
Type
Old Value
New Value
Added
Description
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.