CVE-2026-90555: Vllm

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Vllm Vllm: before 0.28.0 (fixed in 0.28.0)

Published 2026-09-12. Last modified 2026-09-16.