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-2026-61777 is a deserialization of untrusted data vulnerability affecting NVIDIA Megatron Bridge. An attacker who successfully exploits this vulnerability could achieve remote code execution, tamper with data, and disclose sensitive information. The vulnerability is currently undergoing analysis on the NVD. NVIDIA has published a security advisory via their product-security GitHub repository. The flaw is rated as high criticality given the potential impact of code execution and data compromise. No additional technical details or proof-of-concept exploits are referenced in the current advisory. Users of NVIDIA Megatron Bridge should monitor NVIDIA's security advisories for patches and mitigations.