Auth bypass in Go-Vikunja Vikunja
CVE-2026-33680
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.2, the `LinkSharing.ReadAll()` method allows link share authenticated users to list all link shares for a project, including their secret hashes. While `LinkSharing.CanRead()` correctly blocks link share users from reading individual shares via `ReadOne`, the `ReadAllWeb` handler bypasses this check by never calling `CanRead()`. An attacker with a read-only link share can retrieve hashes for write or admin link shares on the same project and authenticate with them, escalating to full admin access. Version 2.2.2 patches the issue.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Go-Vikunja Vikunja — versions < 2.2.2
- Vikunja
Weakness classification (CWE)
References
- github.com/go-vikunja/vikunja/security/advisories/GHSA-8hp8-9fhr-pfm9 (Exploit, Vendor Advisory)
- github.com/go-vikunja/vikunja/commit/9efe1fadba817923c7c7f5953c3e9e9c5683bbf3 (Patch)
- vikunja.io/changelog/vikunja-v2.2.2-was-released (Release Notes)
Frequently asked questions
- What is CVE-2026-33680?
- CVE-2026-33680 is a high-severity vulnerability in Go-Vikunja Vikunja, classified under Improper Authorization. CVSS score: 7.5/10. Published 2026-03-24.
- How severe is CVE-2026-33680?
- High severity. CVSS v3 base score is 7.5 out of 10.