CVE-2026-33335: medium-severity vulnerability in go-vikunja vikunja
Vikunja Desktop allows arbitrary local application invocation via unvalidated shell.openExternal
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.4epss 0.3%
Vikunja is an open-source self-hosted task management platform. Starting in version 0.21.0 and prior to version 2.2.0, the Vikunja Desktop Electron wrapper passes URLs from `window.open()` calls directly to `shell.openExternal()` without any validation or protocol allowlisting. An attacker who can place a link with `target="_blank"` (or that otherwise triggers `window.open`) in user-generated content can cause the victim's operating system to open arbitrary URI schemes, invoking local applications, opening local files, or triggering custom protocol handlers. Version 2.2.0 patches the issue.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
Affected products
go-vikunja · vikunjaRelated CVEs — go-vikunja vikunja
In the same product, most dangerous first.
CVE-2026-33336MEDIUMVikunja Desktop vulnerable to Remote Code Execution via same-window navigationEPSS 1.2%CVE-2026-27819HIGHVikunja has Path Traversal in CLI RestoreEPSS 0.8%CVE-2026-28268CRITICALVikunja Vulnerable to Account Takeover via Password Reset Token ReuseEPSS 0.7%CVE-2026-91973HIGHVikunja before 2.6.0 Authentication Bypass via CalDAV BasicAuthEPSS 0.7%CVE-2026-91972HIGHVikunja before 2.6.0 Authentication Bypass via Unthrottled APIEPSS 0.6%CVE-2026-27616HIGHVikunja Vulnerable to Stored Cross-Site Scripting (XSS) via Unsanitized SVG Attachment Upload Leading to Token ExposureEPSS 0.5%