#VU124864 Protection Mechanism Failure in vLLM - CVE-2026-27893
Published: April 4, 2026
Vulnerability identifier: #VU124864
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-27893
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
vLLM
vLLM
Software vendor:
vLLM
vLLM
Description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to protection mechanism failure in NemotronVL and KimiK25 model implementation files when loading model sub-components from a malicious model repository. A remote attacker can supply a malicious model repository to execute arbitrary code.
User interaction is required because the malicious model must be loaded by vLLM. The issue bypasses the user's explicit trust_remote_code=false security opt-out by hardcoding trust_remote_code=true in affected code paths.
Remediation
Install security update from vendor's website.