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Servers and applications

CVE-2026-126399

vLLM 0.19.0 before 0.31.0 Resource Exhaustion via Request-Level num_frames

Severity
High 7.1
Published
13 Nov 2026
Last changed
13 Nov 2026
Added to UpHeron
13 Nov 2026
Fixed in
0.31.0
Weakness
Allocation without limits (CWE-770)
Attack
Over the network · Needs a user account · No user action needed
Attacker can
Take it down
CVSS vector
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
Sources
CVE Program

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.

From the CVE Program.

Affected software

SoftwareAffected versions
vLLMServers and applications · cna:vllm-project|vllm
  • From 0.19.0 before 0.31.0

References

  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-126399