CVE-2026-33335
highpriority · track · 32EPSS 0.004 · 32 %ileEUUSEPSS · scored 2026-10-21
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 2.5–8
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (7)
External citations — patches, advisories, analysis.
- https://github.com/go-vikunja/vikunja/releasesPatchcnnvd
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6q44-85gc-cjvfcnnvd
- https://vikunja.io/changelog/vikunja-v2.2.0-was-releasedcnnvd
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6q44-85gc-cjvfenisa_euvd
- https://vikunja.io/changelog/vikunja-v2.2.0-was-releasedenisa_euvd
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-6q44-85gc-cjvfExploitVendor Advisorynvd
- https://vikunja.io/changelog/vikunja-v2.2.0-was-releasedRelease Notesnvd
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