CVE-2026-109311— vLLM before 0.29.0 Heap Overflow DoS via IAMF Audio Transcription Upload
Quick assessment
Affected
vllm-project vllm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 vLLM 0.29.0 之前的版本中，上传的音频文件通过仅进行文件大小检查后，被传递给 PyAV/FFmpeg 的 回退机制，从而暴露了 FFmpeg 的 IAMF 解析器中的堆溢出漏洞。经过身份验证的远程攻击者可以向 接口反复上传结构错误的 IAMF 容器，导致堆内存被破坏，并最终使 API 进程崩溃。
Possible ATT&CK Techniques 3 AI
T1068 · Exploitation for Privilege Escalation T1529 · System Shutdown/Reboot T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| vllm-project | vllm | < 0.29.0 |
affected |
0.29.0 |
unaffected |
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I. Basic Information for CVE-2026-109311
Vulnerability Information
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Vulnerability Title
vLLM before 0.29.0 Heap Overflow DoS via IAMF Audio Transcription Upload
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| vllm-project | vllm | 0 ~ 0.29.0 | - |
|
II. Public POCs for CVE-2026-109311
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-109311 (2)
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V. Comments for CVE-2026-109311
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