Reliance on Untrusted Inputs in a Security Decision in vLLM - #VU146572
Published: September 1, 2026
Vulnerability identifier: #VU146572
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-807
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to reliance on untrusted inputs in a security decision in the /v1/audio/transcriptions audio decoding path when processing a crafted audio file with a forged header sample rate. A remote user can submit a specially crafted FLAC file to cause a denial of service.
Exploitation requires a valid API key and a transcription-capable model with the /v1/audio/* endpoint mounted.
Affected software
vLLM
Remediation
Install security update from vendor's website.
vLLM - update to 0.28.0