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CVE-2026-35598

Vikunja has Missing Authorization on CalDAV Task Read

Published: Apr 10, 2026Updated: Apr 17, 2026 Sources: CVE List NVDCWE-862
NVD MITRE
4.3CVSSMEDIUM
EPSS Score
0.2%
Top 88.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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 guesses) a task UID can read the full task data from any project on the instance. This vulnerability is fixed in 2.3.0.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-862

Affected Products

vikunjago-vikunja
On-prem
Cloud & SaaS / saas-application
vikunjavikunja
On-prem
Enterprise Software / collaboration-groupware
go-vikunjaoss-projectCloud & SaaSaka vikunja
vikunjaoss-projectEnterprise Software

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-48ch-p4gq-x46x
github.com
https://github.com/go-vikunja/vikunja/pull/2579
github.com
https://github.com/go-vikunja/vikunja/commit/879462d717351fe5d276ddec5246bdec31b41661
github.com
and 1 more references View all →

Timeline

Published
Apr 10, 2026
Last Updated
Apr 17, 2026

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