{"id":"CVE-2025-48956","aliases":["GHSA-rxc4-3w6r-4v47","PYSEC-2026-2021"],"url":"https://o3.security/vulnerability/CVE-2025-48956","summary":"vLLM API endpoints vulnerable to Denial of Service Attacks","details":"vLLM is an inference and serving engine for large language models (LLMs). From 0.1.0 to before 0.10.1.1, a Denial of Service (DoS) vulnerability can be triggered by sending a single HTTP GET request with an extremely large header to an HTTP endpoint. This results in server memory exhaustion, potentially leading to a crash or unresponsiveness. The attack does not require authentication, making it exploitable by any remote user. This vulnerability is fixed in 0.10.1.1.","published":"2025-08-21T14:41:03.889Z","modified":"2026-08-08T03:47:53.366041021Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"vllm","fixedVersion":"0.10.1.1"}],"fix":{"url":"https://github.com/vllm-project/vllm/commit/d8b736f913a59117803d6701521d2e4861701944","label":"vllm-project/vllm@d8b736f"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/48xxx/CVE-2025-48956.json"},{"type":"ADVISORY","url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-rxc4-3w6r-4v47"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-48956"},{"type":"FIX","url":"https://github.com/vllm-project/vllm/commit/d8b736f913a59117803d6701521d2e4861701944"},{"type":"FIX","url":"https://github.com/vllm-project/vllm/pull/23267"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-08T03:47:53.366041021Z"}}