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CVE-2026-55067— Vikunja: Authenticated cross-tenant kanban-bucket relocation via `project_view_id` mass-assignment

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.

Vikunja 是一个开源的自托管任务管理平台。在 2.4.0 版本之前，POST /api/v1/projects/{project}/views/{view}/buckets/{bucket} 接口的请求体中 project_view_id 参数可以透过 pkg/models/kanban.go 中的 Bucket.Update 方法进行批量赋值（mass assignment）。权限校验仅验证该 bucket 当前属于 URL 中指定的项目和视图，但未校验请求体中指定的目标视图（destination vie

CVSS 5.0 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
go-vikunja vikunja < 2.4.0 affected
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I. Basic Information for CVE-2026-55067

Vulnerability Information
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Vulnerability Title
Vikunja: Authenticated cross-tenant kanban-bucket relocation via `project_view_id` mass-assignment
Source: CVE Program / CVE List V5
Vulnerability Description
Vikunja is an open-source self-hosted task management platform. Prior to 2.4.0, POST /api/v1/projects/{project}/views/{view}/buckets/{bucket} allows the request body project_view_id value to be mass assigned by Bucket.Update in pkg/models/kanban.go. The permission check validates that the bucket currently belongs to the URL project and view but does not validate the body selected destination view, allowing any authenticated user to relocate an attacker-owned bucket into another tenant’s Kanban view. The injected bucket retains attacker-controlled content and ownership, enabling cross-tenant defacement. 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:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
go-vikunja vikunja < 2.4.0 -

II. Public POCs for CVE-2026-55067

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III. Intelligence Information for CVE-2026-55067

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Patches & Fixes for CVE-2026-55067 (2)

Vendor Advisories for CVE-2026-55067 (1)

Vendor Pages for CVE-2026-55067 (1)

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

CVE-2026-55065 8.1 HIGH Vikunja: Improper Authorization and Authorization Bypass Through User-Controlled Key in co
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-2026-55064 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-639

V. Comments for CVE-2026-55067

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