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CVE-2026-111917— Vikunja 2.3.0 before 2.7.0 WebSocket Authentication Ignores Session Revocation

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.

在 Vikunja 2.3.0 至 2.7.0（不含 2.7.0）版本中，存在一个会话验证不当的漏洞。由于 函数从未将 JWT 中的 （会话 ID）声明与会话表进行比对，攻击者即使在会话被撤销后，仍可持续保持 WebSocket 访问权限。持有被盗访问令牌的攻击者可在会话被删除或启用 TOTP（双因素认证）后，建立或维持对 端点的连接，并持续接收受害者的 推送消息，其中包含评论、任务和项目等敏感内容。

CVSS 6.5 · Medium EPSS 0.28% · P19

Possible ATT&CK Techniques 1 AI

T1552.004 · Private Keys

Affected Version Matrix 2

VendorProduct Version RangeStatus
go-vikunja vikunja 2.3.0< 2.7.0 affected
2.7.0 unaffected
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I. Basic Information for CVE-2026-111917

Vulnerability Information
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Vulnerability Title
Vikunja 2.3.0 before 2.7.0 WebSocket Authentication Ignores Session Revocation
Source: CVE Program / CVE List V5
Vulnerability Description
Vikunja 2.3.0 before 2.7.0 contains an improper session validation vulnerability that allows attackers to keep WebSocket access after revocation because handleAuth never checks the JWT sid claim against the sessions table. Attackers holding a stolen access token can open or maintain connections to /api/v2/ws after session deletion or TOTP enrollment, continuing to receive the victim's notification.created pushes, including comment, task and project content.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的会话过期机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
go-vikunja vikunja 2.3.0 ~ 2.7.0 -

II. Public POCs for CVE-2026-111917

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-111917

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Vendor Advisories for CVE-2026-111917 (2)

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

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-2026-111921 5.4 MEDIUM Vikunja 0.13.0 before 2.7.0 Incorrect Authorization in Link Share Deletion
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-613

V. Comments for CVE-2026-111917

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