Uncaught Exception in vLLM - CVE-2026-114051
Published: October 6, 2026 / Updated: October 23, 2026
Vulnerability identifier: #VU153336
CSH Severity: Low
CVSS v4: 7.1 [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]
CVE-ID: CVE-2026-114051
CWE-ID: CWE-248
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to an uncaught exception in the EngineCore input processing thread when decoding a generation request with inconsistent token limits. A remote user can send a specially crafted request to cause a denial of service.
The health endpoint can continue returning HTTP 200 after generation requests stop being served.
Affected software
vLLM
How to mitigate CVE-2026-114051
Install security update from vendor's website.
vLLM - update to 0.31.0