| Component | vLLM |
| Severity | medium (CVSS 6.5) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Published (NVD) | 2026-09-12 |
| Last modified | 2026-09-16 |
| Affected versions | vllm < 0.28.0 |
| Fixed in | 0.28.0 |
| Weakness | CWE-409 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade vLLM to
0.28.0or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-90555
- https://github.com/vllm-project/vllm/security/advisories/GHSA-99f2-hwrc-gvq8
- https://www.vulncheck.com/advisories/vllm-before-0.28.0-denial-of-service-via-audio-header
Read more
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