CVE-2026-91981
Vikunja before 2.6.0 User Enumeration via v2 API
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
Vikunja versions before 2.6.0 fail to properly validate link-share tokens in the v2 API user search endpoints. Attackers with a read-only share link can enumerate project users via the projects endpoint and confirm arbitrary usernames exist via the global search endpoint.
| CWE | CWE-200 |
| Vendor | go-vikunja |
| Product | vikunja |
| Published | Sep 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
go-vikunja / vikunja
0 < 2.6.0
References
Credits
🔍 0xcelien