EUVD-2026-69332
GHSA-hg5m-pcc2-c3v2
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector and low privileges reflect access required to supply untrusted serialized input; full triad justified by arbitrary code execution with 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 local attacker with low-privilege access to achieve code execution, data tampering, and information disclosure on the host system. The vulnerability (CWE-502) is exploitable locally without user interaction, making it particularly relevant in multi-tenant high-performance compute environments where Megatron Bridge is used for large-scale model training pipelines. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local user account on the system hosting NVIDIA Megatron Bridge (AV:L), with at minimum low operating-system privileges (PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 (High) is driven by the full C:H/I:H/A:H impact triad offset by the local attack vector (AV:L) and low-privilege requirement (PR:L), which significantly constrains the attacker population. … 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 the authoritative fix version, which was not independently confirmed from the available data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all deployments of NVIDIA Megatron Bridge and assess exposure in multi-tenant or shared-access environments; prioritize systems handling sensitive models or data. …
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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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