EUVD-2026-69307
GHSA-7w88-xwp7-ff8g
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector and low privilege confirmed by description; full CIA impact follows from arbitrary code execution via deserialization gadget chain.
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 arbitrary code execution, tamper with data, and disclose sensitive information on affected systems. Rooted in CWE-502, the flaw arises when the bridge component deserializes attacker-influenced data without adequate validation - a well-understood attack class that is particularly dangerous in distributed AI training infrastructure where serialized model state or inter-process messages transit between components. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires local user-level access (PR:L per CVSS) to the system where NVIDIA Megatron Bridge is installed and running. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score reflects genuine severity: low-privilege local access is sufficient, attack complexity is low, and the full CIA triad is compromised if exploitation succeeds. … 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 and apply the remediation prescribed in the NVIDIA Product Security 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, conduct a complete inventory of systems running NVIDIA Megatron Bridge, document installed versions, and isolate or disable the component where operationally feasible. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
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External POC / Exploit Code
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