CVE-2026-126399
MEDIUM
NVD
CVSS Score
6.5
Severity
MEDIUM
Published
Nov 13, 2026
Vendor
unknown
Description
vLLM from 0.19.0 before 0.31.0 contains a resource exhaustion vulnerability that allows inference clients to bypass the server frame limit by setting media_io_kwargs.video.num_frames in chat completion requests. Attackers can supply num_frames=-1 or a large value with many base64 JPEG frames, forcing VideoMediaIO to decode all frames and np.stack them, causing memory exhaustion.