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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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
https://github.com/vllm-project/vllm/security/advisories/GHSA-m52c-39rh-f3gp

Configurations

No configuration.

History

18 Oct 2026, 12:17

Type	Values Removed	Values Added
References	~~() https://github.com/vllm-project/vllm/security/advisories/GHSA-m52c-39rh-f3gp -~~	() https://github.com/vllm-project/vllm/security/advisories/GHSA-m52c-39rh-f3gp -

12 Oct 2026, 17:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-12 17:17

Updated : 2026-10-18 12:17

NVD link : CVE-2026-109311

Mitre link : CVE-2026-109311

CVE.ORG link : CVE-2026-109311

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

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