What is CVE-2026-35601?

CVE-2026-35601 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under CRLF Injection. CVSS score: 4.1/10. Published 2026-04-10.

How severe is CVE-2026-35601?

Medium severity. CVSS v3 base score is 4.1 out of 10.

Vulnerability in Go-Vikunja Vikunja

CVE-2026-35601

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.

Vulnerability class: CRLF Injection

EPSS: 0.002 (9.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N.

Affected products

Go-vikunja Vikunja — versions < 2.3.0
Vikunja

Weakness classification (CWE)

CWE-93 — CRLF Injection

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Issue Tracking)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-35601?: CVE-2026-35601 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under CRLF Injection. CVSS score: 4.1/10. Published 2026-04-10.
How severe is CVE-2026-35601?: Medium severity. CVSS v3 base score is 4.1 out of 10.