CVE-2026-35601

MEDIUM

Vikunja <2.3.0 CalDAV Task Output - iCalendar Property Injection

Title source: manual
STIX 2.1

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.

References (3)

Core 3
Core References
X_Refsource_Misc x_refsource_misc
https://github.com/go-vikunja/vikunja/pull/2580

Scores

CVSS v3 4.1
EPSS 0.0020
EPSS Percentile 9.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-93
Status published
Products (3)
code.vikunja.io/api 0 - 2.3.0Go
go-vikunja/vikunja < 2.3.0
vikunja/vikunja < 2.3.0
Published Apr 10, 2026
Tracked Since Apr 10, 2026