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CVE-2026-111921— Vikunja 0.13.0 before 2.7.0 Incorrect Authorization in Link Share Deletion

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 0.13.0 至 2.7.0 之前的版本存在一个授权缺陷：拥有“写入”权限的项目成员可以删除管理员级别的链接分享。该漏洞的根源在于删除权限检查读取了一个未加载的分享对象。攻击者可以向 v1 或 v2 版本的“项目分享”端点发送带有连续分享 ID 的 DELETE 请求，从而撤销管理员链接并使现有的分享会话失效。

CVSS 5.4 · Medium EPSS 0.18% · P7

Affected Version Matrix 2

VendorProduct Version RangeStatus
go-vikunja vikunja 0.13.0< 2.7.0 affected
2.7.0 unaffected
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I. Basic Information for CVE-2026-111921

Vulnerability Information
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Vulnerability Title
Vikunja 0.13.0 before 2.7.0 Incorrect Authorization in Link Share Deletion
Source: CVE Program / CVE List V5
Vulnerability Description
Vikunja 0.13.0 before 2.7.0 contains an incorrect authorization vulnerability that allows project members with Write permission to delete admin-tier link shares because the delete permission check reads an unloaded share object. Attackers can send DELETE requests to the v1 or v2 projects shares endpoints with sequential share IDs to revoke admin links and invalidate existing share sessions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
go-vikunja vikunja 0.13.0 ~ 2.7.0 -

II. Public POCs for CVE-2026-111921

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III. Intelligence Information for CVE-2026-111921

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Vendor Advisories for CVE-2026-111921 (1)

Vendor Pages for CVE-2026-111921 (1)

Same Patch Batch · go-vikunja · 2026-10-17 · 6 CVEs total

CVE-2026-111917 6.5 MEDIUM Vikunja 2.3.0 before 2.7.0 WebSocket Authentication Ignores Session Revocation
CVE-2026-111919 6.5 MEDIUM Vikunja 0.22.0 before 2.7.0 Improper Access Revocation via Webhooks
CVE-2026-111922 6.3 MEDIUM Vikunja 2.2.0 before 2.7.0 Permissive CORS Policy Trusting Localhost Origins
CVE-2026-111918 5.4 MEDIUM Vikunja 1.0.0-rc0 before 2.7.0 Cross-Tenant Task Position Writes via Saved Filter Creation
CVE-2026-111920 4.3 MEDIUM Vikunja 2.6.0 Broken Access Control via Inherited Project Permissions

IV. Related Vulnerabilities

Same product: vikunja
Same vendor: go-vikunja
Same weakness: CWE-863

V. Comments for CVE-2026-111921

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