EUVD-2026-69331
GHSA-g25g-2qwm-xrx9
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack vector with low privileges is consistent with deserialization via a local interface; full CIA impact reflects arbitrary code execution capability.
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 allows a local attacker with low privileges to achieve arbitrary code execution, tamper with data, and disclose sensitive information. The vulnerability (CWE-502) exists in the Megatron Bridge component of NVIDIA's large-scale model training infrastructure, where attacker-controlled serialized input is processed without adequate validation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS vector (AV:L/PR:L) confirms that exploitation requires an attacker to have a local account or process on the system running NVIDIA Megatron Bridge with at minimum low-privilege access - unauthenticated remote exploitation is not indicated. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 7.8 (High) with a local attack vector (AV:L), low complexity (AC:L), and low privileges required (PR:L) reflects an attack scenario constrained to users or processes already present on the host running Megatron Bridge. … 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 patch guidance; no exact fixed version is specified in the available data, so this must be verified directly with NVIDIA. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running NVIDIA Megatron Bridge and identify which grant local user access; notify infrastructure and security teams of the patch gap. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
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External POC / Exploit Code
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