{"id":"CVE-2026-5497","aliases":["GHSA-wcwg-c5fc-9vrc","PYSEC-2026-2302"],"url":"https://o3.security/vulnerability/CVE-2026-5497","summary":"Unbounded Frame Count in video/jpeg Base64 Data URL Processing Leads to OOM DoS in vllm-project/vllm","details":"vLLM versions 0.8.0 and later are vulnerable to an Out-of-Memory (OOM) Denial of Service (DoS) attack due to unbounded frame count processing in the `VideoMediaIO.load_base64()` method. When processing `video/jpeg` data URLs, the method splits the base64 data string on commas to extract individual JPEG frames without enforcing a frame count limit. An attacker can exploit this by crafting a single API request containing thousands of comma-separated base64-encoded JPEG frames in a data URL, causing the server to decode all frames into memory and crash due to excessive memory consumption. This vulnerability is reachable via the OpenAI-compatible chat completions API and does not require authentication.","published":"2026-06-11T08:31:18.953Z","modified":"2026-08-18T20:40:58.539253503Z","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":"0.19.0"}],"fix":{"url":"https://github.com/vllm-project/vllm/commit/58ee61422169ce17e08248f8efa1e9df434fe395","label":"vllm-project/vllm@58ee614"},"references":[{"type":"WEB","url":"https://huntr.com/bounties/7bd92629-b396-4449-8f88-6c0092530eb4"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5497.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-5497"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5497.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5497"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2487813"},{"type":"FIX","url":"https://github.com/vllm-project/vllm/commit/58ee61422169ce17e08248f8efa1e9df434fe395"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T20:40:58.539253503Z"}}