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CVE-2026-91981

MEDIUM CVSS: 4.3 Published: 2026-09-15 Modified: 2026-09-16

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.

Affected Platforms

Unknown

Weakness Type

CWE-200

References