{"id":"CVE-2026-90878","aliases":["EUVD-2026-78268","GHSA-2h9j-24rv-h4c7"],"status":"published","title":"vllm-project vLLM Jinja Template Rendering completions resource consumption","description":"A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chat_template causes resource consumption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00533,"percentile":0.45448,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400","CWE-404"],"published":"2026-09-15T04:15:11Z","modified":"2026-10-28T02:30:44Z","products":[{"vendor":"vllm-project","product":"vllm"}],"references":[{"url":"https://vuldb.com/vuln/403472","tags":["vdb-entry","technical-description","advisory"]},{"url":"https://vuldb.com/vuln/403472/cti","tags":["signature","permissions-required","report"]},{"url":"https://vuldb.com/cve/CVE-2026-90878","tags":["third-party-advisory","advisory"]},{"url":"https://vuldb.com/submit/927901","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/vllm-project/vllm/issues/52025","tags":["exploit","issue-tracking","report"]},{"url":"https://github.com/vllm-project/vllm/pull/52163","tags":["issue-tracking","patch","fix"]},{"url":"https://github.com/vllm-project/vllm/","tags":["product","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90878","tags":["advisory"]},{"url":"https://github.com/vllm-project/vllm"},{"url":"https://github.com/advisories/GHSA-2h9j-24rv-h4c7"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90878.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-90878","title":"vllm-project vLLM Jinja Template Rendering completions resource consumption","description":"A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chat_template causes resource consumption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.","status":"published","published":"2026-09-15T04:15:11.051Z","modified":"2026-09-15T13:54:06.533Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium","assessor":"cna"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","level":"medium","assessor":"cna"},{"version":"3.0","score":4.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","level":"medium","assessor":"cna"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR","assessor":"cna"}],"cwes":["CWE-400","CWE-404"],"updated_at":"2026-11-02T13:45:47.885058Z"}],"euvd":[{"id":"EUVD-2026-78268","description":"A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chat_template causes resource consumption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.","status":"published","published":"2026-09-15T04:15:11Z","modified":"2026-09-15T13:54:06Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"medium"}],"updated_at":"2026-11-02T17:28:18.438671Z"}],"ghsa":[{"id":"GHSA-2h9j-24rv-h4c7","title":"A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of...","description":"A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chat_template causes resource consumption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.","status":"published","published":"2026-09-15T06:30:32Z","modified":"2026-09-15T06:30:32Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:11:53.5286Z"}],"nvd":[{"id":"CVE-2026-90878","description":"A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chat_template causes resource consumption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.","status":"published","published":"2026-09-15T05:16:59.42Z","modified":"2026-09-15T14:37:14.523Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low","assessor":"secondary"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"secondary"}],"cwes":["CWE-400","CWE-404"],"updated_at":"2026-11-02T14:12:47.335523Z"}],"osv":[{"id":"CVE-2026-90878","title":"vllm-project vLLM Jinja Template Rendering completions resource consumption","description":"A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects an unknown part of the file /v1/chat/completions of the component Jinja Template Rendering. This manipulation of the argument chat_template causes resource consumption. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.","status":"published","published":"2026-09-15T04:15:11.051Z","modified":"2026-10-28T02:30:44.490183611Z","cvss":[{"version":"4.0","score":2.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","level":"low"}],"cwes":["CWE-400","CWE-404"],"updated_at":"2026-11-02T15:45:20.269367Z"}]}}