High · CVSS 7.1CVE-2026-90555

vLLM before 0.28.0 Denial of Service via Audio HeaderCVE-2026-90555

Answer in brief

CVE-2026-90555 records a High severity (CVSS 7.1) vulnerability in vLLM before 0.28.0 Denial of Service via Audio Header. The current sources do not mark it as known exploited. The current feed maps vllm-project/vLLM (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 12, 2026Updated Sep 16, 2026Source checked Oct 27, 2026First seen by HOL Sep 12, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.1
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps vllm-project/vLLM (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:vllm:vllm::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
vllm-project/vLLMgeneric	>=0 <0.28.0	0.28.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for vllm-project/vLLM.
Review the reported fix. Update vllm-project/vLLM to 0.28.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 12, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 12, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.