EUVD-2026-51991

Vikunja: Link-share principal ID collision allows cross-account API token issuance and management...

CVE-2026-91981

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...

CVE-2026-91981

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...

CVE-2026-91981: Exposure of Sensitive Information to an Unauthorized Actor

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...

PT-2026-92095

Name of the Vulnerable Software and Affected Versions Vikunja versions prior to 2.6.0 Description Improper validation of link-share tokens in the v2 API user search endpoints allows attackers possessing a read-only share link to enumerate project users through the 'projects' endpoint and verify t...

PT-2026-67335

Name of the Vulnerable Software and Affected Versions Vikunja versions 0.24.0 through 2.3.0 Description A broken object level authorization BOLA issue exists in the task-collection endpoint 'GET /api/v1/projects/project/views/view/tasks'. The system loads the project view from the URL path withou...

CVE-2026-35594

CVE-2026-35594 affects Vikunja prior to version 2.3.0, where link-share JWTs were validated entirely from JWT claims without server-side checks. The GetLinkShareFromClaims path builds a LinkSharing object without database validation, allowing previously issued link-share JWTs to retain their orig...

GHSA-96Q5-XM3P-7M84 Vikunja: Link Share JWT tokens remain valid for 72 hours after share deletion or permission downgrade

Title Link Share JWT tokens remain valid for 72 hours after share deletion or permission downgrade Description Vikunja's link share authentication constructs authorization objects entirely from JWT claims without any server-side database validation. When a project owner deletes a link share or...

PT-2026-31945

Name of the Vulnerable Software and Affected Versions Vikunja versions prior to 2.3.0 Description Vikunja's link share authentication constructs authorization objects entirely from JWT claims without server-side database validation. When a project owner deletes a link share or downgrades its...