# CVE-2026-61762: NVIDIA Megatron Bridge unsafe deserialization

Source: https://junglewise.ai/threats/cve-2026-61762-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-2026-61762 · Severity: high · CVSS 7.8 · Published 2026-09-01

NVIDIA Megatron Bridge is a component used for distributed machine learning model training. A vulnerability in how it processes data allows an attacker to execute arbitrary code, modify data, or steal sensitive information by sending specially crafted serialized objects.

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-2026-61762 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-61762 being exploited in the wild.

**How severe is CVE-2026-61762?** 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-2026-61762?** 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-2026-61762 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-61762?** 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 classic unsafe deserialization flaw in NVIDIA Megatron Bridge where untrusted data is deserialized without proper validation. An attacker can exploit this by crafting malicious serialized objects that, when deserialized by the application, trigger arbitrary code execution. The attack vector and authentication requirements are not fully detailed in the advisory; however, deserialization vulnerabilities are typically remotely exploitable if the vulnerable component processes network input. A successful exploit allows code execution, data tampering, and information disclosure. The advisory does not indicate patch availability at this time.

## 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-2026-61762](https://www.cve.org/CVERecord?id=CVE-2026-61762)

## 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)