CVE-2026-45229: CP0204 Quark-Auto-Save

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Quark Drive before 0.8.5 contains a mass assignment vulnerability in the POST /update endpoint that allows authenticated attackers to overwrite administrator credentials by posting an arbitrary webui object to the config_data dictionary. Attackers can exploit insufficient deny-list filtering to permanently replace stored login credentials, lock out legitimate administrators, and gain persistent access to all configured tasks, cloud tokens, and notification services.

Affected products

• CP0204 Quark-Auto-Save: before 0.8.5 (fixed in 0.8.5)

Published 2026-05-13. Last modified 2026-07-14.