CVE-2026-90555

Medium

Description

vLLM versions before 0.28.0 fail to validate audio sample rate headers in the transcription endpoint, allowing authenticated clients to bypass duration checks. Attackers can submit forged FLAC headers with inflated sample rates to trigger excessive memory allocation and crash the API server process affecting all tenants.

SeverityMedium

CVSS6.5

Exploit probability—

ProductVllm

PublishedSep 12, 2026

First seenSep 12, 2026

Weakness typeCWE-409CWE-409

How to fix

Update

vllm vllm0.28.0 or later

Vendor advisories

github.com/vllm-project/vllm/security/advisories/GHSA-99f2-hwrc-gvq8

Affected products

Product	Affected versions	Fixed in
vllm vllm	v < 0.28.0	0.28.0

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