CVE-2026-90555 vLLM before 0.28.0 Denial of Service via Audio Header
Authenticated attackers can crash the vLLM API server by submitting forged audio headers, causing a denial of service for all tenants.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90555?
CVE-2026-90555 is a high-severity denial of service vulnerability in Vllm Vllm, published on 12 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-409
Which versions are affected by CVE-2026-90555?
It affects 1 product.
Products include Vllm Vllm.
How do I fix CVE-2026-90555?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-90555 being exploited?
There is no known exploitation of CVE-2026-90555 in the wild and no public exploit code.
Other vulnerabilities in Vllm Vllm
- CVE-2025-32444 vLLM Vulnerable to Remote Code Execution via Mooncake Integration
- CVE-2026-22778 vLLM leaks a heap address when PIL throws an error
- CVE-2025-47277 vLLM Allows Remote Code Execution via PyNcclPipe Communication Service
- CVE-2024-11041 Remote Code Execution in vllm-project/vllm
- CVE-2026-48746 vLLM: OpenAI auth bypass
Sources
Also known as GHSA-99f2-hwrc-gvq8, GHSA-mpw6-hvj8-87hq, MINI-32p2-734g-fxmv, MINI-6x98-rm5q-fhww, MINI-ghfx-66rp-xm8x.