Executive brief
NVIDIA Megatron Bridge is a library used for distributed training of large neural networks across multiple GPUs and nodes. A deserialization vulnerability allows an attacker to execute arbitrary code, modify data, or access sensitive information when untrusted serialized data is processed by the library.
Technical details
The vulnerability involves unsafe deserialization of untrusted data in NVIDIA Megatron Bridge. An attacker can exploit this by providing specially crafted serialized payloads that, when deserialized by the application, result in arbitrary code execution. The attack requires the ability to influence or control serialized data fed to the deserialization process, which may occur through network-accessible APIs, model loading, or inter-process communication. A successful exploit enables remote code execution, data tampering, and information disclosure. Patches are expected from NVIDIA.
Affected products
- NVIDIA Megatron Bridge
Timeline
- 2026-09-01: disclosed