EUVD-2026-69320
GHSA-35mq-hwv5-23m7
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local deserialization attack requires low-privileged local access; full triad compromise consistent with arbitrary code execution impact.
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 full system compromise, including arbitrary code execution, data tampering, and information disclosure. The CVSS 3.1 score of 7.8 (AV:L/AC:L/PR:L/UI:N) confirms that exploitation requires local access with minimal privilege but no user interaction, making it a realistic threat in multi-tenant AI training environments where Megatron Bridge is used. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local account with low privileges (PR:L per CVSS) on the system running NVIDIA Megatron Bridge - network-remote unauthenticated exploitation is not possible given AV:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score reflects a locally-exploitable vulnerability with high confidentiality, integrity, and availability impact, but no network exposure and low attack complexity - meaning that once local access is achieved, exploitation is straightforward. … 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 patch or updated version identified in the NVIDIA PSIRT advisory at https://github.com/NVIDIA/product-security/tree/main/2026/5868. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all systems running NVIDIA Megatron Bridge to identify deployment scope and assess exposure in multi-tenant environments; document all systems and active user access patterns. …
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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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