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.
Metrics
Affected Vendors & Products
References
History
Mon, 21 Sep 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Tue, 15 Sep 2026 15:30:00 +0000
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| Description | 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. | |
| Title | Vikunja before 2.6.0 User Enumeration via v2 API | |
| First Time appeared |
Vikunja
Vikunja vikunja |
|
| Weaknesses | CWE-200 | |
| CPEs | cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Vikunja
Vikunja vikunja |
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| References |
| |
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-09-15T15:18:25.523Z
Updated: 2026-09-21T18:47:28.550Z
Reserved: 2026-09-15T11:10:41.353Z
Link: CVE-2026-91981
Updated: 2026-09-21T18:47:02.775Z
Status : Deferred
Published: 2026-09-15T16:17:55.087
Modified: 2026-09-21T19:17:16.220
Link: CVE-2026-91981
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