EUVD-2026-69306
GHSA-vvxg-r849-2jhh
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector confirmed by attack surface; low privilege matches shared-cluster access model; full C/I/A impact consistent with arbitrary code execution via deserialization gadget chain.
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, low-privileged attacker to achieve code execution, data tampering, and information disclosure on the affected host. The vulnerability (CWE-502) stems from the application accepting and processing serialized data without adequate validation, enabling crafted payloads to subvert normal deserialization logic. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires local access to the host running NVIDIA Megatron Bridge with at least low-level privileges (PR:L per CVSS vector) - a standard unprivileged OS account suffices. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 7.8 (High) reflects a worst-case local impact: low access complexity and no user interaction required, with a full high/high/high impact across confidentiality, integrity, and availability. … 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 PSIRT advisory at https://github.com/NVIDIA/product-security/tree/main/2026/5868 for the official patch or upgraded release version - no specific fix version was included in the available data, so the exact remediation version must be confirmed from the vendor. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all production systems running NVIDIA Megatron Bridge and document current user access controls and deployment architectures. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
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External POC / Exploit Code
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