EUVD-2026-69311
GHSA-rxg5-wwj3-84ph
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector and low privileges required to write a crafted payload to a path readable by the bridge process; no user interaction needed once payload is planted.
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 host. The local attack vector (AV:L) and low-privilege requirement (PR:L) limit the attack surface to users or processes with existing system access, yet the full C:H/I:H/A:H impact triad makes successful exploitation highly consequential. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to have an existing local session or execution context on the host running Megatron Bridge, with at least low-privilege OS access (consistent with CVSS PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects a serious but locally-scoped vulnerability. … 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 patch or upgraded version identified in the NVIDIA PSIRT 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, inventory all systems running NVIDIA Megatron Bridge and document exact versions; immediately review local access privileges and restrict multi-user system access where operationally feasible. …
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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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