GO-2026-4847 Vikunja has Cross-Project Information Disclosure via Task Relations — Missing Authorization Check on Related Task Read in code.vikunja.io/api

Vikunja has Cross-Project Information Disclosure via Task Relations — Missing Authorization Check on Related Task Read in code.vikunja.io/api. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is...

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

Summary Two independently-exploitable authorization flaws in Vikunja can be chained to allow an unauthenticated attacker to download and delete every file attachment across all projects in a Vikunja instance. The ReadAll endpoint for link shares exposes share hashes including admin-level shares t...

GHSA-2PV8-4C52-MF8J Vikunja: Unauthenticated Instance-Wide Data Breach via Link Share Hash Disclosure Chained with Cross-Project Attachment IDOR

Summary Two independently-exploitable authorization flaws in Vikunja can be chained to allow an unauthenticated attacker to download and delete every file attachment across all projects in a Vikunja instance. The ReadAll endpoint for link shares exposes share hashes including admin-level shares t...

CVE-2026-33676

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, when the Vikunja API returns tasks, it populates the relatedtasks field with full task objects for all related tasks without checking whether the requesting user has read permission on those tasks' projects. A...

CVE-2026-33700

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, 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...

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...

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: IDOR in Task Attachment ReadOne Allows Cross-Project File Access and Deletion

Summary TaskAttachment.ReadOne queries attachments by ID only WHERE id = ?, ignoring the task ID from the URL path. The permission check in CanRead validates access to the task specified in the URL, but ReadOne loads a different attachment that may belong to a task in another project. This allows...

GHSA-JFMM-MJCP-8WQ2 Vikjuna: IDOR in Task Attachment ReadOne Allows Cross-Project File Access and Deletion

Summary TaskAttachment.ReadOne queries attachments by ID only WHERE id = ?, ignoring the task ID from the URL path. The permission check in CanRead validates access to the task specified in the URL, but ReadOne loads a different attachment that may belong to a task in another project. This allows...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization in the addRelatedTasksToTasks function. An attacker can obtain unauthorized access to sensitive task metadata from projects they do not have permission to view by reading tasks that have cross-project relations...

GHSA-8CMM-J6C4-RR8V Vikunja has Cross-Project Information Disclosure via Task Relations — Missing Authorization Check on Related Task Read

Summary When the Vikunja API returns tasks, it populates the relatedtasks field with full task objects for all related tasks without checking whether the requesting user has read permission on those tasks' projects. An authenticated user who can read a task that has cross-project relations will...

EUVD-2026-14917

Vikunja has Cross-Project Information Disclosure via Task Relations — Missing Authorization Check on Related Task Read...

Incorrect Authorization

Overview Affected versions of this package are vulnerable to Incorrect Authorization in the addRelatedTasksToTasks function. An attacker can obtain unauthorized access to sensitive task metadata from projects they do not have permission to view by reading tasks that have cross-project relations...

Vikunja has Cross-Project Information Disclosure via Task Relations — Missing Authorization Check on Related Task Read

Summary When the Vikunja API returns tasks, it populates the relatedtasks field with full task objects for all related tasks without checking whether the requesting user has read permission on those tasks' projects. An authenticated user who can read a task that has cross-project relations will...

CVE-2026-2726

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.10 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to perform unauthorized actions on merge requests in other projects due to improper access control during...

CVE-2026-2726 Incorrect Authorization in GitLab

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.10 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to perform unauthorized actions on merge requests in other projects due to improper access control during...

CVE-2026-2726 Incorrect Authorization in GitLab

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.10 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to perform unauthorized actions on merge requests in other projects due to improper access control during...

CVE-2026-2726

GitLab CVE-2026-2726: An issue in GitLab CE/EE allowed an authenticated user to performUnauthorized actions on merge requests in other projects due to improper access control during cross-repository operations. Affected versions were: 11.10 to before 18.8.7, 18.9 before 18.9.3, and 18.10 before 1...

Vikunja has Cross-Project Information Disclosure via Task Relations — Missing Authorization Check on Related Task Read

When the Vikunja API returns tasks, it populates the relatedtasks field with full task objects for all related tasks without checking whether the requesting user has read permission on those tasks' projects. An authenticated user who can read a task that has cross-project relations will receive...

Vikjuna: IDOR in Task Attachment ReadOne Allows Cross-Project File Access and Deletion

TaskAttachment.ReadOne queries attachments by ID only WHERE id = ?, ignoring the task ID from the URL path. The permission check in CanRead validates access to the task specified in the URL, but ReadOne loads a different attachment that may belong to a task in another project. This allows any...