CVE-2026-109311
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.
- Score
- CVSS 4.0 7.1 High
- Status
- Awaiting Analysis - disclosure@vulncheck.com
- Published
- 2026-10-12
- Last modified
- 2026-10-18
- Weaknesses
- CWE-20
Affected products
References
- https://github.com/vllm-project/vllm/security/advisories/GHSA-m52c-39rh-f3gp
- https://www.vulncheck.com/advisories/vllm-before-0.29.0-heap-overflow-dos-via-iamf-audio-transcription-upload
