{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-48746: vLLM: OpenAI auth bypass","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-48746","status":"final","version":"1","initial_release_date":"2026-06-22T21:57:28.997Z","current_release_date":"2026-06-22T21:57:28.997Z","revision_history":[{"date":"2026-06-22T21:57:28.997Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"vLLM is an inference and serving engine for large language models (LLMs). From 0.3.0 until 0.22.0, a vulnerability in ASGI web servers and starlette's trust on those web servers enables an authentication bypass of the OpenAI API AuthenticationMiddleware. It allows to use the API without providing the configured VLLM_API_KEY or --api-key. This vulnerability is fixed in 0.22.0.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-48746 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-48746"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-48746"},{"category":"external","summary":"https://github.com/vllm-project/vllm/security/advisories/GHSA-94f4-hr76-p5j6","url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-94f4-hr76-p5j6"},{"category":"external","summary":"https://github.com/vllm-project/vllm/pull/43426","url":"https://github.com/vllm-project/vllm/pull/43426"},{"category":"external","summary":"https://x41-dsec.de/lab/advisories/x41-2026-002-starlette","url":"https://x41-dsec.de/lab/advisories/x41-2026-002-starlette"}]},"product_tree":{"branches":[{"category":"vendor","name":"vllm-project","branches":[{"category":"product_name","name":"vllm","branches":[{"category":"product_version","name":">= 0.3.0, < 0.22.0","product":{"name":"vllm-project vllm >= 0.3.0, < 0.22.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:vllm-project:vllm:\\>\\=_0.3.0\\,_\\<_0.22.0:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-48746","title":"vLLM: OpenAI auth bypass","notes":[{"category":"description","text":"vLLM is an inference and serving engine for large language models (LLMs). From 0.3.0 until 0.22.0, a vulnerability in ASGI web servers and starlette's trust on those web servers enables an authentication bypass of the OpenAI API AuthenticationMiddleware. It allows to use the API without providing the configured VLLM_API_KEY or --api-key. This vulnerability is fixed in 0.22.0.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","baseScore":9.1,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}