Deserialization of Untrusted Data in Megatron-LM - CVE-2025-33248
Published: May 18, 2026
Vulnerability identifier: #VU131646
CSH Severity: Medium
CVSS v4: 8.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-33248
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 the hybrid conversion script. A remote user can trick a victim to open a specially crafted file 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-2025-33248
Install updates from vendor's website.
Megatron-LM - update to 0.15.3