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CVE WatchSep 15, 2026

CVE-2026-90878

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 compo

CVSS

4.3

Medium

EPSS

KEV

Exploit Today

0-100

Published: Sep 15, 2026 · Last modified: Sep 15, 2026 · CWE-400 · CWE-404

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references
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CVE-2026-90878 — A vulnerability was determined in vllm-project vLLM up to 0.27.1. This affects a · Pulse | Pulse