Improper input validation in vLLM - CVE-2026-22773
Published: April 4, 2026
Vulnerability identifier: #VU124862
CSH Severity: Low
CVSS v4.0: 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-2026-22773
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: vLLM
Affected software:
vLLM
vLLM
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improper input handling in the Idefics3 vision model image processor when parsing a specially crafted 1x1 pixel image with ambiguous dimensions. A remote user can send a specially crafted image payload to cause a denial of service.
This issue affects vLLM serving multimodal models that use the Idefics3 architecture and results in an unhandled runtime error that terminates the EngineCore process.
How to mitigate CVE-2026-22773
Install security update from vendor's website.