CVE-2026-61775: NVIDIA Megatron Bridge unsafe deserialization

CVE-2026-61775 · Severity: high · CVSS 7.8 · Published 2026-09-01

NVIDIA Megatron Bridge is a distributed training framework used to parallelize large machine learning models across multiple GPUs and nodes. The framework contains a deserialization vulnerability that could allow an attacker to execute arbitrary code, tamper with model data, or steal sensitive information from the training environment.

Technologies: Nvidia Megatron-Bridge, Nvidia Nemo Megatron Bridge. Vendors: Nvidia.

Quick answers

Is CVE-2026-61775 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-61775 being exploited in the wild.
How severe is CVE-2026-61775?
High severity, with a CVSS score of 7.8, published 1 September 2026.
Which products and versions are affected?
NVIDIA Megatron Bridge.
Is there a fix for CVE-2026-61775?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-61775 attacked?
It is attacked over the network.
Am I affected by CVE-2026-61775?
Check whether you run Nvidia Megatron-Bridge or Nvidia Nemo Megatron Bridge. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is caused by unsafe deserialization of untrusted data in NVIDIA Megatron Bridge. An attacker can craft malicious serialized payloads that, when deserialized by the application, lead to remote code execution. The attack vector and preconditions (e.g., whether network access, authentication, or user interaction is required) are not fully specified in the advisory. A successful exploit enables code execution, data tampering, and information disclosure within the context of the affected process. Patches or mitigations are not detailed in the provided advisory text.

Affected products

  • NVIDIA Megatron Bridge

Timeline

  • 2026-09-01: disclosed

References

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