Executive brief
NVIDIA Megatron Bridge, a tool used for interfacing with large-scale AI model training frameworks, contains a security vulnerability in how it manages software code resources. If an attacker successfully exploits this flaw, they could gain unauthorized control over the system, potentially leading to the theft of sensitive data, tampering with AI models, or full system takeover. This requires a user to interact with a malicious file or resource provided by the attacker.
Technical details
NVIDIA Megatron Bridge versions 0.0 through 0.4.0 are vulnerable to improper control of dynamically managed code resources (CWE-470). The vulnerability stems from unsafe reflection or the use of externally-controlled input to select classes or code. An attacker can exploit this by convincing a user to interact with a malicious resource, leading to local code execution, escalation of privileges, data tampering, and information disclosure. The attack vector is local (AV:L) and requires user interaction (UI:R). A fix is typically addressed by updating to a version beyond 0.4.0.
Affected products
- NVIDIA Megatron-Bridge 0.0 to 0.4.0
Timeline
- 2026-07-01: advisory: NVIDIA published the security advisory.
- 2026-07-01: disclosed: CVE record published to NVD.