CVE-2026-123527
Vikunja 2.4.0 before 2.7.1 API Token Scope Collision Authorization Bypass
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
Vikunja from 2.4.0 before 2.7.1 contains an authorization bypass vulnerability that allows token holders to perform unintended operations due to colliding v1 and v2 API token permission keys. Attackers with a token scoped to read project backgrounds can delete them via the v2 DELETE background route, and bucket create-only tokens can update existing buckets.
| CWE | CWE-863 |
| Vendor | go-vikunja |
| Product | vikunja |
| Published | Nov 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low
Affected Versions
go-vikunja / vikunja
2.4.0 < 2.7.1
References
Credits
🔍 dylanzonix