EUVD-2026-69329
GHSA-696v-wv7g-4ggx
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access with low privilege matches a shared-host training bridge context; full C/I/A impact reflects arbitrary code execution and data tampering potential.
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 exposes systems to local code execution, data tampering, and information disclosure from a low-privileged local user. The vulnerability (CWE-502) allows an attacker with local access to supply malicious serialized payloads that the bridge processes without sufficient validation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a low-privileged local account (PR:L per CVSS vector) on a host running NVIDIA Megatron Bridge - remote unauthenticated exploitation is not possible given AV:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score reflects the full-triad high impact (C:H/I:H/A:H) but is moderated by the local attack vector (AV:L) and low-privilege prerequisite (PR:L), which bound real-world risk to scenarios involving local access to a Megatron Bridge host - typically high-performance GPU cluster nodes shared among AI research or engineering teams. … 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 the official patch release and exact fixed version - no specific patched version number is confirmed from the available intelligence data, so the precise upgrade target should be obtained directly from that advisory. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running NVIDIA Megatron Bridge and document which systems process sensitive data; establish principle of least privilege controls to restrict local user account access to Megatron Bridge processes. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Information Disclosure
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External POC / Exploit Code
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