Medium 4.3Published Sep 15, 2026

CVE-2026-90878vllm-project vLLM Jinja Template Rendering completions resource consumption

Updated under an hour ago (2026-10-19 10:20 UTC)

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Every CVE for vllm-project vLLM

Exploited in the last 30 days

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.

CVSS: 4.3 MEDIUM (v3.1, CNA)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
Weakness (CWE): CWE-400, CWE-404
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Sep 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

vllm-project vLLM vllm-project:vllm	0.27.0; 0.27.1	CNA record

References

https://vuldb.com/vuln/403472vdb-entry, technical-description
https://vuldb.com/vuln/403472/ctisignature, permissions-required
https://vuldb.com/cve/CVE-2026-90878third-party-advisory
https://vuldb.com/submit/927901third-party-advisory
https://github.com/vllm-project/vllm/issues/52025exploit, issue-tracking
https://github.com/vllm-project/vllm/pull/52163issue-tracking, patch
https://github.com/vllm-project/vllm/product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.