NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A successful exploit of this vulnerability might lead to code execution, data tampering, and information disclosure.

CVE-2026-61756 is a deserialization of untrusted data vulnerability affecting NVIDIA Megatron Bridge. An attacker who successfully exploits this flaw could achieve remote code execution, tamper with data, and disclose sensitive information. The vulnerability is tracked by NVD and NVIDIA's product security team. It has been assigned a high criticality rating. The issue stems from improper handling of serialized data inputs, a common but severe class of vulnerability. NVIDIA has published security advisory details via their GitHub product-security repository. Users and administrators of NVIDIA Megatron Bridge are advised to review the advisory and apply any available mitigations or patches promptly.