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CVE-2026-55065— Vikunja: Improper Authorization and Authorization Bypass Through User-Controlled Key in code.vikunja.io/api

Quick assessment

Affected
go-vikunja vikunja
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

go-vikunja Vikunja是go-vikunja组织的一款任务管理服务器软件。 go-vikunja Vikunja 0.24.6版本至2.4.0之前版本存在授权问题漏洞，该漏洞源于项目视图标识符授权验证不完善，可能导致已认证用户跨项目删除看板分配和排序。

CVSS 8.1 · High EPSS 0.50% · P42

Possible ATT&CK Techniques 1 AI

T1079

Affected Version Matrix 1

VendorProduct Version RangeStatus
go-vikunja vikunja >= 0.24.6, < 2.4.0 affected
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I. Basic Information for CVE-2026-55065

Vulnerability Information
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Vulnerability Title
Vikunja: Improper Authorization and Authorization Bypass Through User-Controlled Key in code.vikunja.io/api
Source: CVE Program / CVE List V5
Vulnerability Description
Vikunja 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
go-vikunja Vikunja 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
go-vikunja Vikunja是go-vikunja组织的一款任务管理服务器软件。 go-vikunja Vikunja 0.24.6版本至2.4.0之前版本存在授权问题漏洞，该漏洞源于项目视图标识符授权验证不完善，可能导致已认证用户跨项目删除看板分配和排序。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
go-vikunja vikunja >= 0.24.6, < 2.4.0 -

II. Public POCs for CVE-2026-55065

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III. Intelligence Information for CVE-2026-55065

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Patches & Fixes for CVE-2026-55065 (2)

Vendor Advisories for CVE-2026-55065 (1)

Vendor Pages for CVE-2026-55065 (1)

Same Patch Batch · go-vikunja · 2026-08-28 · 5 CVEs total

CVE-2026-55066 7.1 HIGH Vikunja: Cross-tenant IDOR in kanban move-task endpoint via unauthorized body task_id
CVE-2026-54766 5.3 MEDIUM Vikunja: Project duplication bypasses write-permission check on the target parent project
CVE-2026-55067 5.0 MEDIUM Vikunja: Authenticated cross-tenant kanban-bucket relocation via `project_view_id` mass-as
CVE-2026-55064 4.3 MEDIUM Vikunja incomplete fix for CVE-2026-35595: Write-only user can detach shared project from

IV. Related Vulnerabilities

Same product: vikunja
Same vendor: go-vikunja
Same weakness: CWE-285