CVE-2026-35601

CVE-2026-35601 affects Vikunja prior to 2.3.0 where the CalDAV output generator concatenates iCalendar VTODO fields without RFC 5545 escaping. User-controlled task titles containing CRLF can break the SUMMARY boundary, enabling injection of arbitrary iCalendar properties such as ATTACH, VALARM, o...

CVE-2026-35598 Vikunja has Missing Authorization on CalDAV Task Read

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the CalDAV GetResource and GetResourcesByList methods fetch tasks by UID from the database without verifying that the authenticated user has access to the task's project. Any authenticated CalDAV user who knows or...

Vikunja has iCalendar Property Injection via CRLF in CalDAV Task Output

Summary 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...

EUVD-2026-21425

Vikunja Missing Authorization on CalDAV Task Read...

Vikunja injection vulnerability

Vikunja is an open-source to-do application developed by Vikunja developers. Versions of Vikunja prior to 2.3.0 had a injection vulnerability. This vulnerability stemmed from the CalDAV output generator failing to properly escape the RFC 5545 TEXT value when constructing iCalendar entries using r...

PT-2026-31952

Name of the Vulnerable Software and Affected Versions Vikunja versions prior to 2.3.0 Description Vikunja, a self-hosted task management platform, has an issue where the CalDAV output generator doesn't properly escape characters in iCalendar VTODO entries. Specifically, user-controlled task title...

CVE-2026-33668

Vikunja is an open-source self-hosted task management platform. Starting in version 0.18.0 and prior to version 2.2.1, when a user account is disabled or locked, the status check is only enforced on the local login and JWT token refresh paths. Three other authentication paths — API tokens, CalDAV...

CVE-2026-33315 Vikunja has a 2FA Bypass via Caldav Basic Auth

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, the Caldav endpoint allows login using Basic Authentication, which in turn allows users to bypass the TOTP on 2FA-enabled accounts. The user can then access standard project information that would normally be...

EUVD-2025-27571

Malicious code in bioql PyPI...

CVE-2025-59045 Stalwart vulnerable to Memory Exhaustion via CalDAV Event Expansion

Stalwart is a mail and collaboration server. Starting in version 0.12.0 and prior to version 0.13.3, a memory exhaustion vulnerability exists in Stalwart's CalDAV implementation that allows authenticated attackers to cause denial-of-service by triggering unbounded memory consumption through...

CVE-2025-59045 Stalwart vulnerable to Memory Exhaustion via CalDAV Event Expansion

Stalwart is a mail and collaboration server. Starting in version 0.12.0 and prior to version 0.13.3, a memory exhaustion vulnerability exists in Stalwart's CalDAV implementation that allows authenticated attackers to cause denial-of-service by triggering unbounded memory consumption through...

CVE-2016-10836

cPanel before 55.9999.141 allows arbitrary file-read operations during authentication with caldav SEC-108...

cyrus-imapd: buffer overflow in CalDAV request handling triggered by a long iCalendar property name

A flaw was found in the CalDAV feature in httpd in Cyrus IMAP. This flaw allows a remote attacker to execute arbitrary code via a crafted HTTP PUT operation for an event with a long iCalendar property name...