{"cve":"CVE-2025-59425","nvd":{"published":"2025-10-07T14:15:38.950","modified":"2026-10-19T16:10:00.260","status":"Analyzed","description":"vLLM is an inference and serving engine for large language models (LLMs). Before version 0.11.0rc2, the API key support in vLLM performs validation using a method that was vulnerable to a timing attack. API key validation uses a string comparison that takes longer the more characters the provided API key gets correct. Data analysis across many attempts could allow an attacker to determine when it finds the next correct character in the key sequence. Deployments relying on vLLM's built-in API key validation are vulnerable to authentication bypass using this technique. Version 0.11.0rc2 fixes the issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-385"],"references":["https://github.com/vllm-project/vllm/blob/4b946d693e0af15740e9ca9c0e059d5f333b1083/vllm/entrypoints/openai/api_server.py#L1270-L1274","https://github.com/vllm-project/vllm/commit/ee10d7e6ff5875386c7f136ce8b5f525c8fcef48","https://github.com/vllm-project/vllm/releases/tag/v0.11.0","https://github.com/vllm-project/vllm/security/advisories/GHSA-wr9h-g72x-mwhm"],"products":["vllm:vllm"],"source":"nvd","synced_at":"2026-10-19T22:11:26.888974865+00:00"},"epss":{"cve":"CVE-2025-59425","score":0.00566,"percentile":0.46696,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-wr9h-g72x-mwhm","url":"https://osv.dev/vulnerability/GHSA-wr9h-g72x-mwhm","summary":"vLLM is vulnerable to timing attack at bearer auth","modified":"2026-09-10T03:50:30.288567114Z","packages":[{"ecosystem":"PyPI","name":"vllm","purl":"pkg:pypi/vllm","ranges":["<0.11.0"],"fixed":["0.11.0"]}]},{"id":"PYSEC-2026-2026","url":"https://osv.dev/vulnerability/PYSEC-2026-2026","summary":"vLLM is vulnerable to timing attack at bearer auth","modified":"2026-07-07T17:48:17.631626364Z","packages":[{"ecosystem":"PyPI","name":"vllm","purl":"pkg:pypi/vllm","ranges":["<0.11.0"],"fixed":["0.11.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}