Is CVE-2026-90878 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-90878?

CVE-2026-90878 has a CVSS v3 severity of MEDIUM (4.3).

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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.