CVE-2026-35601
Medium
Description
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the CalDAV output generator builds iCalendar VTODO entries via raw string concatenation without applying RFC 5545 TEXT value escaping. User-controlled task titles containing CRLF characters break the iCalendar property boundary, allowing injection of arbitrary iCalendar properties such as ATTACH, VALARM, or ORGANIZER. This vulnerability is fixed in 2.3.0.
SeverityMedium
CVSS4.1
Exploit probability—
ProductVikunja
PublishedApr 10, 2026
First seenApr 10, 2026
Weakness typeCWE-93CWE-93
How to fix
Update
- vikunja vikunja2.3.0 or later
- code.vikunja.io/api2.3.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vikunja vikunja | v < 2.3.0 | 2.3.0 |
| code.vikunja.io/apiGo | v < 2.3.0, No range specified | 2.3.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.