VULNERABILITY INTELLIGENCE

CVE-2026-35601

CVSS score4.1 MEDIUM
EPSS probability0.20%
CISA KEVNot currently listed
Published2026-04-10
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N

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.

Weakness classification

  • CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')

Primary references