Vikunja: Improper Authorization and Authorization Bypass Through User-Controlled Key in code.vikunja.io/api

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55065
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 20:18:23 UTC
Updated2026-09-01 02:16:58 UTC
DescriptionVikunja is an open-source self-hosted task management platform. From 0.24.6 until 2.4.0, DELETE /api/v1/projects/:project/views/:view permits an authenticated user to supply a view identifier from another project while authorizing only against an attacker-controlled project identifier. ProjectView.CanDelete in pkg/models/project_view_permissions.go does not establish that the view belongs to the path project, and ProjectView.Delete in pkg/models/project_view.go continues after the scoped project_views delete affects no rows. Its subsequent deletes select task_buckets and task_positions only by project_view_id, allowing cross-tenant destruction of Kanban assignments and ordering while leaving the victim view and tasks intact. This issue is fixed in version 2.4.0.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS: 0.003480000 probability, percentile 0.275710000 (date 2026-08-31)

Problem Types: CWE-285 | CWE-639 | CWE-285 CWE-285: Improper Authorization | CWE-639 CWE-639: Authorization Bypass Through User-Controlled Key

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Go-vikunja Vikunja affected >= 0.24.6, < 2.4.0 Not specified

References

ReferenceSourceLinkTags
github.com/go-vikunja/vikunja/releases/tag/v2.4.0 [email protected] github.com
github.com/go-vikunja/vikunja/pull/3239 [email protected] github.com
github.com/go-vikunja/vikunja/commit/6895a7765ef1667be4b79df29549d33b9e1... [email protected] github.com
github.com/go-vikunja/vikunja/security/advisories/GHSA-gg93-x632-9ccv 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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