CVE-2026-35601

Published: Apr 10, 2026Modified: Jun 17, 2026

4.1

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N

Exploitability: 2.3 / Impact: 1.4

Source: security-advisories@github.com (Secondary)

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.

Affected (1)

Products: Vikunja: Vikunja

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Vikunja Vikunja	Before 2.3.0

Related CWEs

Improper Neutralization of CRLF Sequences ('CRLF Injection')

The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

References (4)

https://github.com/go-vikunja/vikunja/pull/2580

Source: security-advisories@github.com

Issue Tracking

https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0

Source: security-advisories@github.com

Release Notes

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-2g7h-7rqr-9p4r

Source: security-advisories@github.com

ExploitVendor Advisory

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-2g7h-7rqr-9p4r

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

ExploitVendor Advisory

Timeline

No history available yet.