{"schema":"threatline.record/2","record":{"id":"CVE-2026-105759","aliases":["GHSA-5fj9-pfhr-6j48"],"summary":"vLLM: Unbounded Prometheus label cardinality from attacker-controlled HTTP method tokens in the vLLM Rust frontend metrics middleware (unauthenticated denial of service)","details":"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.","categories":["Unclassified"],"product":"vllm","vendor":"vllm-project","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-105759","source_modified_at":"2026-10-06T17:56:44.425Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"vllm","vendor":"vllm-project","versions":[{"version":"< 0.30.0","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":5.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00364,"percentile":0.29096,"score_date":"2026-10-23"},"published_at":"2026-10-05T22:58:01.362Z","modified_at":"2026-10-06T17:56:44.425Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-105759","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-06T17:56:44.425Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-105759","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-5fj9-pfhr-6j48","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/vllm-project/vllm/pull/56058","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/vllm-project/vllm/commit/3735c2d5f5248259482b9045c34fb7a8a3892352","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/vllm-project/vllm/releases/tag/v0.30.0","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-06T17:56:34.732350Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-06T17:56:44.425Z","content_hash":"ef3fc90cec5b3783a0741f1d59b15ac804968c91258e6bbc7504faf276723247"}}