CVE-2026-96424 UBports CVE debrief

Who should care

Defenders responsible for systems using lomiri-download-manager, especially those with untrusted users or exposed DBus interfaces, should assess their exposure and prioritize mitigation.

Why it matters

CVE-2026-96424 is a high-severity vulnerability in lomiri-download-manager that allows arbitrary file reads as root over DBus due to an incorrect policy. Defenders should verify their inventory, review DBus policies, restrict access, and monitor for suspicious activity.

• Potential unauthorized file access as root
• Possible escalation of privileges
• Increased risk of data breaches
• Need for verification of affected versions and systems

Technical summary

The CVE-2026-96424 vulnerability is caused by an incorrect DBus policy in lomiri-upload-manager, part of lomiri-download-manager. This allows an arbitrary user to read arbitrary files as root over DBus. The vulnerability has a CVSS score of 7.8 and is considered HIGH severity. The incorrect policy enables unauthorized access to sensitive system files, potentially leading to data breaches or privilege escalation. Defenders should verify affected versions, review system configurations, and implement necessary mitigations to restrict access to DBus interfaces for lomiri-upload-manager.

Defensive priority

Defenders should prioritize verifying and mitigating this vulnerability in their systems, especially those using lomiri-download-manager.

Recommended defensive actions

• Verify the presence of lomiri-download-manager in your inventory
• Review DBus policies for lomiri-upload-manager
• Restrict access to DBus interfaces for lomiri-upload-manager
• Monitor for suspicious DBus activity related to lomiri-download-manager
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD details indicate an incorrect DBus policy in lomiri-upload-manager allows arbitrary users to read arbitrary files as root over DBus. However, specific versions affected and exploitation details are not provided.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.