EUVD-2026-69322
GHSA-2w87-vgxx-q53h
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local deserialization pathway accessible to low-privileged users; full CIA impact consistent with code execution; unchanged scope as Bridge process does not span system boundaries.
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 enables a local low-privileged attacker to achieve code execution, data tampering, and information disclosure with no user interaction required. The AV:L/PR:L CVSS vector confines the attack to actors who already hold a valid local account on the affected host, limiting but not eliminating real-world risk in shared AI infrastructure. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must possess a valid local account on the host running NVIDIA Megatron Bridge, satisfying the PR:L (low privileges required) prerequisite per the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 High score is driven by full confidentiality, integrity, and availability impact on the vulnerable system (C:H/I:H/A:H), but the local attack vector (AV:L) and low-privilege prerequisite (PR:L) are meaningful constraints that distinguish this from a remotely exploitable vulnerability at the same score. … 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 official patch guidance; a specific fixed version number was not present in the available intelligence and cannot be confirmed independently. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running NVIDIA Megatron Bridge and audit local user account access to assess the insider attack surface. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
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External POC / Exploit Code
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