Auth bypass in Go-Vikunja Vikunja
CVE-2026-35598
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (25.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Go-Vikunja Vikunja — versions < 2.3.0
- Vikunja
Weakness classification (CWE)
References
- github.com/go-vikunja/vikunja/security/advisories/GHSA-48ch-p4gq-x46x (Exploit, Vendor Advisory)
- github.com/go-vikunja/vikunja/pull/2579 (Issue Tracking)
- github.com/go-vikunja/vikunja/commit/879462d717351fe5d276ddec5246bdec31b41661 (Patch)
- github.com/go-vikunja/vikunja/releases/tag/v2.3.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-35598?
- CVE-2026-35598 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-04-10.
- How severe is CVE-2026-35598?
- Medium severity. CVSS v3 base score is 4.3 out of 10.