EUVD-2026-69325
GHSA-fqvx-x4x2-xrph
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector and low privilege match a local deserialization attack by any authenticated user with full system impact and no scope change.
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 low-privileged local user to achieve arbitrary code execution, data tampering, and information disclosure on the affected host. Reported directly by NVIDIA PSIRT (psirt@nvidia.com) and classified CWE-502, the flaw requires only local system access with standard user privileges, elevating insider threat and lateral-movement risk in shared AI training environments. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires local system access with at least a standard authenticated user account (CVSS PR:L), consistent with any non-guest OS login on the affected host. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 High rating reflects a local deserialization exploit with low-privilege access (PR:L, AV:L, AC:L) yielding full C/I/A impact, which is an internally consistent and credible scoring given the vulnerability class. … 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 | The primary remediation is to apply the vendor-supplied patch referenced in the NVIDIA product security advisory at https://github.com/NVIDIA/product-security/tree/main/2026/5868; however, no specific fixed version number was present in the available data, so administrators must consult NVIDIA PSIRT directly to confirm the patched release and avoid deploying an insufficient update. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running NVIDIA Megatron Bridge and document user access permissions, prioritizing shared or multi-tenant AI training clusters. …
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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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