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CVE-2026-35596— Vikunja has Broken Access Control on Label Read via SQL Operator Precedence Bug

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hasAccessToLabel函数存在SQL运算符优先级错误，可能导致任何经过身份验证的用户读取任意关联任务的标签信息。

CVSS 4.3 · Medium EPSS 0.35% · P26

Possible ATT&CK Techniques 1 AI

T1115 · Clipboard Data
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I. Basic Information for CVE-2026-35596

Vulnerability Information
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Vulnerability Title
Vikunja has Broken Access Control on Label Read via SQL Operator Precedence Bug
Source: CVE Program / CVE List V5
Vulnerability Description
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the hasAccessToLabel function contains a SQL operator precedence bug that allows any authenticated user to read any label that has at least one task association, regardless of project access. Label titles, descriptions, colors, and creator information are exposed. 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:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
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hasAccessToLabel函数存在SQL运算符优先级错误，可能导致任何经过身份验证的用户读取任意关联任务的标签信息。
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-2026-35596

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III. Intelligence Information for CVE-2026-35596

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Patches & Fixes for CVE-2026-35596 (2)

Vendor Advisories for CVE-2026-35596 (1)

Vendor Pages for CVE-2026-35596 (1)

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

CVE-2026-35595 8.3 HIGH Vikunja Affected by Privilege Escalation via Project Reparenting
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-2026-35598 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-863

V. Comments for CVE-2026-35596

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