CVE-2026-126399

MEDIUM 6.5

vLLM 0.19.0 before 0.31.0 Resource Exhaustion via Request-Level num_frames

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-770
Vendor	vllm-project
Product	vllm
Published	Nov 13, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

vllm-project / vllm

0.19.0 < 0.31.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/vllm-project/vllm/security/advisories/GHSA-vxqj-p4gw-9h4c vulncheck.com: https://www.vulncheck.com/advisories/vllm-0.19.0-before-0.31.0-resource-exhaustion-via-request-level-num-frames

Credits

🔍 m4rgh jperezdealgaba