{"id":"CVE-2026-105759","revision":"aa298e91ad834f76ae849f15ac360eaa","records":[{"revision":"aa298e91ad834f76ae849f15ac360eaa","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-105759","aliases":[],"title":"vLLM: Unbounded Prometheus label cardinality from attacker-controlled HTTP method tokens in the vLLM Rust frontend metrics middleware (unauthenticated denial of service)","description":"vLLM is an inference and serving engine for large language models. Prior to 0.30.0, the Rust frontend's track_http_metrics middleware records the raw HTTP method token as a Prometheus label for requests reaching registered routes. An unauthenticated attacker can send unique arbitrary method tokens to unguarded routes such as /tokenize, causing Prometheus's Family::get_or_create function to permanently create counter and histogram label sets. Those label sets increase process memory usage and enlarge the /metrics response until the service or monitoring path is exhausted. This issue is fixed in version 0.30.0.","state":0,"publishedAt":"2026-10-05T22:58:01.362+00:00","modifiedAt":"2026-10-06T17:56:44.425+00:00","affected":[{"ecosystem":"Vendor product","name":"vllm","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"vllm-project\",\n                    \"product\": \"vllm\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.30.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/vllm-project/vllm/security/advisories/GHSA-5fj9-pfhr-6j48","https://github.com/vllm-project/vllm/pull/56058","https://github.com/vllm-project/vllm/commit/3735c2d5f5248259482b9045c34fb7a8a3892352","https://github.com/vllm-project/vllm/releases/tag/v0.30.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-105759","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-105759","identifiers":["CVE-2026-105759"]},"retained":false,"historicalAffected":[]}],"coverage":[]}