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CVE-2026-35595— Vikunja Affected by Privilege Escalation via Project Reparenting

Quick assessment

Affected
go-vikunja vikunja
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Vikunja是Vikunja开源的一个待办事项应用程序。 Vikunja 2.3.0之前版本存在安全漏洞，该漏洞源于更改父项目ID时的权限检查逻辑与递归权限继承模型不一致，可能导致用户通过移动项目获得管理员权限。

CVSS 8.3 · High EPSS 0.29% · P21
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I. Basic Information for CVE-2026-35595

Vulnerability Information
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Vulnerability Title
Vikunja Affected by Privilege Escalation via Project Reparenting
Source: CVE Program / CVE List V5
Vulnerability Description
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the CanUpdate check at pkg/models/project_permissions.go:139-148 only requires CanWrite on the new parent project when changing parent_project_id. However, Vikunja's permission model uses a recursive CTE that walks up the project hierarchy to compute permissions. Moving a project under a different parent changes the permission inheritance chain. When a user has inherited Write access (from a parent project share) and reparents the child project under their own project tree, the CTE resolves their ownership of the new parent as Admin (permission level 2) on the moved project. This vulnerability is fixed in 2.3.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Vikunja 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vikunja是Vikunja开源的一个待办事项应用程序。 Vikunja 2.3.0之前版本存在安全漏洞，该漏洞源于更改父项目ID时的权限检查逻辑与递归权限继承模型不一致，可能导致用户通过移动项目获得管理员权限。
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 < 2.3.0 -

II. Public POCs for CVE-2026-35595

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10625 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-35595

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Patches & Fixes for CVE-2026-35595 (2)

Vendor Advisories for CVE-2026-35595 (1)

Vendor Pages for CVE-2026-35595 (1)

Same Patch Batch · go-vikunja · 2026-04-10 · 11 CVEs total

CVE-2026-34727 7.4 HIGH Vikunja ahs a TOTP Two-Factor Authentication Bypass via OIDC Login Path
CVE-2026-35594 6.5 MEDIUM Vikunja Link Share JWT tokens remain valid for 72 hours after share deletion or permission
CVE-2026-35599 6.5 MEDIUM Vikunja has an Algorithmic Complexity DoS in Repeating Task Handler
CVE-2026-35597 5.9 MEDIUM Vikunja Affected by TOTP Brute-Force Due to Non-Functional Account Lockout
CVE-2026-35600 5.4 MEDIUM Vikunja has HTML Injection via Task Titles in Overdue Email Notifications
CVE-2026-35602 5.4 MEDIUM Vikunja has a File Size Limit Bypass via Vikunja Import
CVE-2026-35596 4.3 MEDIUM Vikunja has Broken Access Control on Label Read via SQL Operator Precedence Bug
CVE-2026-35598 4.3 MEDIUM Vikunja has Missing Authorization on CalDAV Task Read
CVE-2026-40103 4.3 MEDIUM Vikunja's Scoped API tokens with projects.background permission can delete project backgro
CVE-2026-35601 4.1 MEDIUM Vikunja has an iCalendar Property Injection via CRLF in CalDAV Task Output

IV. Related Vulnerabilities

Same product: vikunja
Same vendor: go-vikunja
Same weakness: CWE-269

V. Comments for CVE-2026-35595

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