EUVD-2026-69314
GHSA-gmmg-7694-vfqf
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local deserialization requiring low-privilege access; AC:L because deserialization gadget chains are typically reliable once the input channel is reachable; full CIA impact consistent with RCE.
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 low-privileged attacker to achieve code execution, data tampering, and information disclosure on the affected system. The CVSS vector (AV:L/PR:L) confirms exploitation requires local access with standard user privileges, making this most relevant to shared multi-user HPC or AI/ML training cluster environments where multiple users interact with the same Megatron infrastructure. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Local system access with a standard (low-privilege) user account is required - confirmed by CVSS AV:L/PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.8 High is credible for this class of vulnerability given the full C/I/A impact, though the local attack vector (AV:L) and low-privilege requirement (PR:L) substantially reduce real-world exposure compared to a network-exploitable variant. … 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 specific patched release version, as no exact fix version was supplied in the available input data. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Within 24 hours, inventory all systems running NVIDIA Megatron Bridge and classify by deployment model (shared multi-user vs. …
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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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