CVE-2026-61751 describes a critical vulnerability in NVIDIA Megatron Bridge involving deserialization of untrusted data. An attacker who successfully exploits this vulnerability could achieve arbitrary code execution, tamper with data, and cause information disclosure. The vulnerability is tracked by NVD at NIST and has been acknowledged by NVIDIA's product security team. No additional technical details or CVSS score are currently published, though the potential impact is severe given the combination of code execution and data compromise outcomes. The advisory is referenced in NVIDIA's official product security GitHub repository. Users of NVIDIA Megatron Bridge should monitor for patches and apply mitigations promptly.