Deserialization of Untrusted Data in Megatron-LM - CVE-2025-33247
Published: May 18, 2026
Vulnerability identifier: #VU131643
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-2025-33247
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 in quantization configuration loading. 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
Megatron-LM
How to mitigate CVE-2025-33247
Install updates from vendor's website.
Megatron-LM - update to 0.15.3