#VU124866 Allocation of Resources Without Limits or Throttling in vLLM - CVE-2026-34755
Published: April 4, 2026
Vulnerability identifier: #VU124866
Vulnerability risk: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-34755
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
vLLM
vLLM
Software vendor:
vLLM
vLLM
Description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in the VideoMediaIO.load_base64() method when processing video/jpeg base64 data URLs. A remote user can send a specially crafted request containing thousands of comma-separated base64-encoded JPEG frames to cause a denial of service.
The video/jpeg base64 code path bypasses the num_frames limit enforced by the load_bytes() path, causing all supplied frames to be decoded into memory and potentially crashing the server with an out-of-memory condition.
Remediation
Install security update from vendor's website.