CVE-2026-109311
6.5MediumPublished 12 Oct 2026 · NVD status: Awaiting Analysis · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Impact
- High impact on availability
- Weakness
- CWE-20
Impact
Authenticated remote attackers can crash the vLLM API process, causing denial of service. They need network access and valid credentials to submit requests to the audio transcriptions endpoint.
Root cause
vLLM passes uploaded audio files directly to PyAV/FFmpeg av.open() with only a file-size check, triggering an underlying heap overflow in FFmpeg's IAMF parser.
Affected systems
vLLM before 0.29.0
CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Fix & remediation
Upgrade vLLM to version 0.29.0 or later. If patching immediately is not possible, block or restrict access to the /v1/audio/transcriptions endpoint.
$ pip install --upgrade 'vllm>=0.29.0'AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
vLLM before 0.29.0 passes uploaded audio to the PyAV/FFmpeg av.open() fallback with only a file-size check, exposing FFmpeg's IAMF parser heap overflow. Authenticated remote attackers can repeatedly upload malformed IAMF containers to /v1/audio/transcriptions, corrupting the heap and crashing the API process.