CVE-2026-76216 Vikunja through 2.4.0 Principal-Type Confusion via LinkSharing

Vikunja through 2.4.0 contains a principal-type confusion vulnerability where LinkSharing principals with id N are treated as user principals with users.id == N at three permission checks lacking type guards. Attackers with a link-share JWT can remove victims from teams, enumerate and delete vict...

SUSE CVE-2026-35594

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's link share authentication GetLinkShareFromClaims in pkg/models/linksharing.go constructs authorization objects entirely from JWT claims without any server-side database validation. When a project owner delet...

CVE-2026-56765

Vikunja before 2.2.1 contains an authorization flaw where the LinkSharing.ReadAll endpoint exposes share hashes to users with read access, enabling permission escalation to admin-level shares. The GetTaskAttachment endpoint performs permission checks against user-supplied task IDs but fetches...

CVE-2026-56765 Vikunja - Unauthenticated Instance-Wide Data Breach via Link Share Hash Disclosure Chained with Cross-Project Attachment IDOR

Vikunja before 2.2.1 contains an authorization flaw where the LinkSharing.ReadAll endpoint exposes share hashes to users with read access, enabling permission escalation to admin-level shares. The GetTaskAttachment endpoint performs permission checks against user-supplied task IDs but fetches...

CVE-2026-56765 Vikunja - Unauthenticated Instance-Wide Data Breach via Link Share Hash Disclosure Chained with Cross-Project Attachment IDOR

Vikunja before 2.2.1 contains an authorization flaw where the LinkSharing.ReadAll endpoint exposes share hashes to users with read access, enabling permission escalation to admin-level shares. The GetTaskAttachment endpoint performs permission checks against user-supplied task IDs but fetches...

CVE-2026-35594

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's link share authentication GetLinkShareFromClaims in pkg/models/linksharing.go constructs authorization objects entirely from JWT claims without any server-side database validation. When a project owner delet...

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...

EUVD-2026-21417

Vikunja: Link Share JWT tokens remain valid for 72 hours after share deletion or permission downgrade...

Vikunja code issues and vulnerabilities

Vikunja is an open-source to-do application developed by Vikunja. Versions of Vikunja prior to 2.3.0 had code vulnerabilities. These vulnerabilities stemmed from the fact that link-sharing authentication was entirely based on JWT claims, without server-side database validation. As a result, delet...

SUSE CVE-2026-33680

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.2, the LinkSharing.ReadAll method allows link share authenticated users to list all link shares for a project, including their secret hashes. While LinkSharing.CanRead correctly blocks link share users from readi...

CVE-2026-33680

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.2, the LinkSharing.ReadAll method allows link share authenticated users to list all link shares for a project, including their secret hashes. While LinkSharing.CanRead correctly blocks link share users from readi...

GHSA-F95F-77JX-FCJC Vikunja has a Link Share Delete IDOR — Missing Project Ownership Check Allows Cross-Project Link Share Deletion

Summary The DELETE /api/v1/projects/:project/shares/:share endpoint does not verify that the link share belongs to the project specified in the URL. An attacker with admin access to any project can delete link shares from other projects by providing their own project ID combined with the target...

Vikjuna: Link Share Hash Disclosure via ReadAll Endpoint Enables Permission Escalation

Summary The LinkSharing.ReadAll method allows link share authenticated users to list all link shares for a project, including their secret hashes. While LinkSharing.CanRead correctly blocks link share users from reading individual shares via ReadOne, the ReadAllWeb handler bypasses this check by...

EUVD-2026-14925

Vikjuna: Link Share Hash Disclosure via ReadAll Endpoint Enables Permission Escalation...

GHSA-8HP8-9FHR-PFM9 Vikjuna: Link Share Hash Disclosure via ReadAll Endpoint Enables Permission Escalation

Summary The LinkSharing.ReadAll method allows link share authenticated users to list all link shares for a project, including their secret hashes. While LinkSharing.CanRead correctly blocks link share users from reading individual shares via ReadOne, the ReadAllWeb handler bypasses this check by...

Vikjuna: Link Share Hash Disclosure via ReadAll Endpoint Enables Permission Escalation

The LinkSharing.ReadAll method allows link share authenticated users to list all link shares for a project, including their secret hashes. While LinkSharing.CanRead correctly blocks link share users from reading individual shares via ReadOne, the ReadAllWeb handler bypasses this check by never...

CVE-2026-33680

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.2, the LinkSharing.ReadAll method allows link share authenticated users to list all link shares for a project, including their secret hashes. While LinkSharing.CanRead correctly blocks link share users from readi...

CVE-2026-33680 Vikunja Vulnerable to Link Share Hash Disclosure via ReadAll Endpoint Enables Permission Escalation

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.2, the LinkSharing.ReadAll method allows link share authenticated users to list all link shares for a project, including their secret hashes. While LinkSharing.CanRead correctly blocks link share users from readi...

CVE-2026-33680

Vikunja before version 2.2.2 is affected: the LinkSharing.ReadAll() API lets link-share users list all shares for a project, exposing secret hashes. Although LinkSharing.CanRead() blocks reading individual shares via ReadOne, the ReadAllWeb handler bypasses this check by never calling CanRead(), ...

CVE-2026-33680 Vikunja Vulnerable to Link Share Hash Disclosure via ReadAll Endpoint Enables Permission Escalation

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.2, the LinkSharing.ReadAll method allows link share authenticated users to list all link shares for a project, including their secret hashes. While LinkSharing.CanRead correctly blocks link share users from readi...