Deserialization of Untrusted Data in vLLM - CVE-2025-9141
Published: December 23, 2025
Vulnerability identifier: #VU120262
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-9141
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insecure input validation when processing serialized data within the Qwen3 Coder tool parser. A remote user can pass specially crafted data to the application and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
vLLM
How to mitigate CVE-2025-9141
Install updates from vendor's website.
vLLM - update to 0.10.1.1