# CVE-2026-61764: NVIDIA Megatron Bridge unsafe deserialization

Source: https://junglewise.ai/threats/cve-2026-61764-nvidia-megatron-bridge-unsafe-deserialization  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-01. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-61764 · Severity: high · CVSS 7.8 · Published 2026-09-01

NVIDIA Megatron Bridge is a software component used in machine learning infrastructure for model training and inference. A vulnerability in how it processes untrusted data allows an attacker to execute arbitrary code, tamper with data, or steal sensitive information without special privileges or authentication.

Technologies: [Nvidia Megatron-Bridge](https://junglewise.ai/threats/technologies/megatron-bridge), [Nvidia Nemo Megatron Bridge](https://junglewise.ai/threats/technologies/nemo-megatron-bridge). Vendors: [Nvidia](https://junglewise.ai/threats/vendors/nvidia).

## Quick answers

**Is CVE-2026-61764 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-61764 being exploited in the wild.

**How severe is CVE-2026-61764?** 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-2026-61764?** 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-2026-61764 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-61764?** 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 a deserialization of untrusted data issue in NVIDIA Megatron Bridge. An attacker can supply maliciously crafted serialized objects that, when deserialized by the application, trigger arbitrary code execution. The attack is network-accessible with no authentication required. Successful exploitation leads to remote code execution, data tampering, and information disclosure. NVIDIA has published CVE-2026-61764 with a CVSS score of 7.8 (high severity).

## Affected products

- NVIDIA Megatron Bridge

## Timeline

- 2026-09-01: disclosed

## References

- [https://github.com/NVIDIA/product-security/tree/main/2026/5868](https://github.com/NVIDIA/product-security/tree/main/2026/5868)
- [https://www.cve.org/CVERecord?id=CVE-2026-61764](https://www.cve.org/CVERecord?id=CVE-2026-61764)

## Related threats

- [NVIDIA Megatron Bridge deserialization vulnerability](https://junglewise.ai/threats/cve-2026-61779-nvidia-megatron-bridge-deserialization-vulnerability)
- [NVIDIA Megatron Bridge deserialization of untrusted data](https://junglewise.ai/threats/cve-2026-61778-nvidia-megatron-bridge-deserialization-of-untrusted-data)
- [NVIDIA Megatron Bridge unsafe deserialization](https://junglewise.ai/threats/cve-2026-61777-nvidia-megatron-bridge-unsafe-deserialization)
- [NVIDIA Megatron Bridge deserialization of untrusted data](https://junglewise.ai/threats/cve-2026-61776-nvidia-megatron-bridge-deserialization-of-untrusted-data)
- [NVIDIA Megatron Bridge unsafe deserialization](https://junglewise.ai/threats/cve-2026-61775-nvidia-megatron-bridge-unsafe-deserialization)