CVE-2026-116179

vLLM 0.18.0 before 0.31.0 Memory Exhaustion via media_io_kwargs num_frames Override

State: Published
Severity: 8.7 High
Published: Oct 25, 2026
Updated: Oct 26, 2026
Reserved: Oct 25, 2026

Description

vLLM from 0.18.0 before 0.31.0 contains a resource exhaustion vulnerability that allows API clients to bypass the video/jpeg frame-count cap by overriding num_frames through media_io_kwargs. Attackers can set num_frames to -1 with a large inline video so VideoMediaIO.load_base64 decodes every frame, exhausting memory and crashing the API frontend.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	VulnCheck
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	VulnCheck

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
vllmvllm-project	0.18.0 to before 0.31.0Affected 0.31.0Not affected

References

GitHub Security Advisory (GHSA-4m6g-h9mv-wqjc)vendor-advisory
VulnCheck Advisory: vLLM 0.18.0 before 0.31.0 Memory Exhaustion via media_io_kwargs num_frames Overridethird-party-advisory

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