CVE-2026-33680
Vikunja Vulnerable to Link Share Hash Disclosure via ReadAll Endpoint Enables Permission Escalation
MEDIUM 6.5EPSS 0.5%
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.
- Affected
- go-vikunja · vikunja
- CVSS v3.1 NVD
- 6.5 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS v3.1 GITHUB
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS
- 0.46% chance of exploitation in the next 30 days, 39th percentile
- Published
- 2026-03-24
- Updated
- 2026-03-26
Proof-of-concept exploits (1)
Security advisories
- go-vikunja/vikunja/security/advisories/GHSA-8hp8-9fhr-pfm9
- go-vikunja/vikunja/commit/9efe1fadba817923c7c7f5953c3e9e9c5683bbf3
- https://vikunja.io/changelog/vikunja-v2.2.2-was-released