EUVD-2026-69319
GHSA-88gc-gjv6-cxfj
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector confirmed by injection through local IPC/filesystem; low privileges consistent with shared-user cluster access; full C/I/A impact from arbitrary code execution via deserialization.
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 exposes systems to code execution, data tampering, and information disclosure when an attacker with local user access supplies a malicious serialized payload to the Bridge process. The local attack vector (AV:L) and low-privilege requirement (PR:L) place this vulnerability in the context of shared AI/ML training infrastructure - multi-tenant GPU clusters where lateral movement between users is the realistic threat model. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local user account or equivalent execution context on the host running NVIDIA Megatron Bridge, consistent with PR:L in the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 base score captures the high CIA impact (C:H/I:H/A:H) but the local attack vector (AV:L) and low-privilege requirement (PR:L) are the critical risk-shaping factors. … 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-released fix described in the NVIDIA Product Security advisory at https://github.com/NVIDIA/product-security/tree/main/2026/5868; an exact patched version number is not independently confirmed from the data provided and must be obtained from that advisory. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all systems running NVIDIA Megatron Bridge and assess your deployment model-specifically, whether multiple users share access to GPU cluster nodes or if strict user isolation is enforced. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
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External POC / Exploit Code
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