EUVD-2026-69330
GHSA-547p-f56v-32h2
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector confirmed by description; low privilege reflects shared-cluster user access; no scope change as impact is confined to the Bridge host.
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, data tampering, and information disclosure on the affected host. The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N, C:H/I:H/A:H) indicates a local, low-complexity exploit path yielding full triad compromise - consistent with classic unsafe deserialization primitives that reconstruct attacker-controlled object graphs. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to have local access to the host running NVIDIA Megatron Bridge with at least low-privilege OS credentials (PR:L per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 base score is driven by high C/I/A impact against a local attack surface requiring only low privilege (PR:L). … 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 patched release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all NVIDIA Megatron Bridge deployments and assess which systems have local user access; restrict system access to authorized administrators only and disable unnecessary local login services. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
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External POC / Exploit Code
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