CVE-2026-35601 — CRLF Injection in Vikunja

CWE-93 — CRLF Injection3 documents3 sources
Severity
4.1MEDIUMNVD
EPSS
0.0%
top 92.30%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Go-vikunja VikunjaCode.vikunja.io API
Timeline
PublishedApr 10

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:NExploitability: 2.3 | Impact: 1.4

Affected Packages2 packages

▶CVEListV5go-vikunja/vikunja< 2.3.0

🔴Vulnerability Details

2
GHSA
Vikunja has iCalendar Property Injection via CRLF in CalDAV Task Output↗2026-04-10
▶
VulDB
go-vikunja up to 2.2.x iCalendar VTODO Entry crlf injection (GHSA-2g7h-7rqr-9p4r)↗2026-04-10
▶