CVE-2026-33335 (GCVE-0-2026-33335)
Vulnerability from cvelistv5 – Published: 2026-03-24 15:07 – Updated: 2026-03-25 13:41
VLAI
EPSS
VEX
Title
Vikunja Desktop allows arbitrary local application invocation via unvalidated shell.openExternal
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-25 13:41 UTC
CWE
- CWE-939 - Improper Authorization in Handler for Custom URL Scheme
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/go-vikunja/vikunja/security/ad… | x_refsource_CONFIRM |
| https://vikunja.io/changelog/vikunja-v2.2.0-was-r… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| go-vikunja | vikunja |
Affected:
>= 0.21.0, < 2.2.0
|
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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