EUVD-2026-69313
GHSA-hmgg-3cg8-872q
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access and low privileges required to supply crafted serialized data; successful deserialization yields full code execution, justifying high C/I/A with unchanged scope.
Primary rating from Vendor (nvidia).
CVSS VectorVendor: nvidia
Lifecycle Timeline
2DescriptionCVE.org
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A successful exploit of this vulnerability might lead to code execution, data tampering, and information disclosure.
Articles & Coverage 2
AnalysisAI
Deserialization of untrusted data in NVIDIA Megatron Bridge enables a local low-privileged attacker to achieve code execution, data tampering, and information disclosure on the affected host. The CVSS 7.8 score (AV:L/PR:L) constrains exploitation to local contexts, but the high impact across all three CIA triad components reflects the severity of a successful exploit. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Attacker must have local system access with at least low-level user privileges (confirmed by CVSS AV:L/PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score is accurate for the impact dimension but the AV:L constraint is the most important limiting factor - this is not a remotely exploitable vulnerability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Consult the NVIDIA Product Security advisory at https://github.com/NVIDIA/product-security/tree/main/2026/5868 for patched versions and upgrade guidance - no exact fixed version number was available in the provided input data, so an exact target version cannot be cited here. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an asset inventory of all systems running NVIDIA Megatron Bridge and assess exposure in multi-user environments where local access is a concern; prioritize systems handling sensitive AI/ML model data. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
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External POC / Exploit Code
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