Quick answers
- Is CVE-2026-61771 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-61771 being exploited in the wild.
- How severe is CVE-2026-61771?
- High severity, with a CVSS score of 7.8, published 1 September 2026.
- Which products and versions are affected?
- Nvidia Megatron-Bridge <UNKNOWN>.
- Is there a fix for CVE-2026-61771?
- 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-2026-61771 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-61771?
- Check whether you run Nvidia Megatron-Bridge or Nvidia Nemo Megatron Bridge at an affected version. 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 who can provide a malicious serialized payload—likely through a network interface or file input—can achieve remote code execution, data tampering, or information disclosure. The attack requires the ability to influence serialized data fed to the framework, but does not appear to require authentication. A patch is expected from NVIDIA.
Affected products
- NVIDIA Megatron Bridge <UNKNOWN>
Timeline
- 2026-09-01: disclosed