EUVD-2026-69305
GHSA-5vjv-6p2m-74xr
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack path with low-privilege user access sufficient; no scope change; full CIA impact on vulnerable process aligns with deserialization-to-RCE class.
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 holding standard user privileges to achieve arbitrary code execution, data tampering, and information disclosure on the affected host. The CVSS 3.1 score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) confirms the exploitation path is local and low-privilege - no network exposure or administrator rights are required, making insider threats, shared-access HPC environments, and compromised user accounts the primary risk vectors. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local user account with at least low-privilege access (PR:L per CVSS) on the system where NVIDIA Megatron Bridge is running - no network-based attack path is indicated by the AV:L vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 7.8 accurately reflects high local impact across all three CIA pillars, but the local attack vector (AV:L) substantially narrows the exploitable population relative to network-accessible deserialization flaws such as Log4Shell. … 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 and exact fixed version, as specific version numbers were not available in the sourced intelligence. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all systems running NVIDIA Megatron Bridge, determine deployment context (shared HPC clusters, multi-tenant research environments, air-gapped systems), and assess number of users with access. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
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External POC / Exploit Code
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