{"id":"CVE-2026-90878","title":"A vulnerability was determined in vllm-project vLLM up to 0.27.1","summary":"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 co…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-400","CWE-404","CWE-606"],"vendor":"vllm-project","product":"vLLM","affected":["vLLM 0.27.0","vLLM 0.27.1"],"published":"2026-09-15","updated":"2026-09-15","sourceUpdated":"2026-09-15T14:37:14.523","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90878","references":[{"url":"https://github.com/vllm-project/vllm/","label":"cna@vuldb.com"},{"url":"https://github.com/vllm-project/vllm/issues/52025","label":"cna@vuldb.com"},{"url":"https://github.com/vllm-project/vllm/pull/52163","label":"cna@vuldb.com"},{"url":"https://vuldb.com/cve/CVE-2026-90878","label":"cna@vuldb.com"},{"url":"https://vuldb.com/submit/927901","label":"cna@vuldb.com"},{"url":"https://vuldb.com/vuln/403472","label":"cna@vuldb.com"},{"url":"https://vuldb.com/vuln/403472/cti","label":"cna@vuldb.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90878.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90878"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533580"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90878"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90878"}],"tags":["nvd","cve.org","exploit-available","csaf","vex","red-hat"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-15T13:41:58.979010Z"},"epss":0.00303,"epssPercentile":0.23157,"ingestedAt":"2026-09-15T05:28:50.102Z","slug":"CVE-2026-90878","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI) · no fix planned: Red Hat AI Inference Server, Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI) · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90878.json)","depth":"twilight","depthScore":36,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":203657,"id":"CVE-2026-90878","ts":1789483132823,"field":"exploit_available","old":"false","new":"true"}]}