{"id":"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.","modified":"2026-07-08T08:09:54.504583102Z","published":"2026-06-11T08:31:18.953Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5497.json","cwe_ids":["CWE-400"],"cna_assigner":"@huntr_ai"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/vllm-project/vllm","events":[{"introduced":"966f933ee1cd7c9a41db60de5c7ff98657005251"},{"fixed":"2a69949bdadf0e8942b7a1619b229cb475beef20"},{"fixed":"58ee61422169ce17e08248f8efa1e9df434fe395"}],"database_specific":{"extracted_events":[{"introduced":"0.8.0"},{"fixed":"0.19.0"}],"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-5497.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}