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CVE-2026-80195— Kimai before 2.63.0 Team Membership Removal via API

Quick assessment

Affected
kimai kimai
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 Kimai 版本低于 2.63.0 的版本中，团队更新 API 端点（PATCH /api/teams/{id}）存在业务逻辑缺陷和授权不当漏洞。该漏洞会在验证提交的替换成员列表之前，先删除所有现有的团队成员记录。一个经过身份验证且具有编辑团队权限的用户（例如团队负责人或其他用户）可以提交一个格式不正确的成员载荷（payload）。尽管 Kimai 会返回验证错误，但现有的成员记录已经被删除。这一行为绕过了专门用于成员移除的端点中对“移除团队负责人”的保护机制，可能导致某个团队没有任何成员或团队负责人，从而破坏

CVSS 5.4 · Medium
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I. Basic Information for CVE-2026-80195

Vulnerability Information
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Vulnerability Title
Kimai before 2.63.0 Team Membership Removal via API
Source: CVE Program / CVE List V5
Vulnerability Description
Kimai before 2.63.0 contains a business logic / improper authorization vulnerability in the team update API endpoint (PATCH /api/teams/{id}), which removes all existing team members before validating the submitted replacement member list. An authenticated teamlead (or other user) with permission to edit a team can submit a malformed members payload; although Kimai returns a validation error, the existing membership rows have already been deleted. This bypasses the dedicated member-removal endpoint's protection against removing teamleaders and can leave a team with no members or teamleaders, disrupting team-based access control.
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
行为工作流的不恰当实施
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kimai kimai 0 ~ 2.63.0 -

II. Public POCs for CVE-2026-80195

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III. Intelligence Information for CVE-2026-80195

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Vendor Advisories for CVE-2026-80195 (2)

Same Patch Batch · kimai · 2026-08-25 · 10 CVEs total

CVE-2026-80193 8.8 HIGH Kimai before 2.62.0 Authorization Bypass via QuickEntry
CVE-2026-80202 8.8 HIGH Kimai before 2.56.0 Authorization Bypass via TimesheetVoter
CVE-2026-80196 7.5 HIGH Kimai before 2.58.0 Authentication Bypass via Password Reset Link
CVE-2026-80198 7.5 HIGH Kimai before 2.56.0 Information Disclosure via config() Twig Function
CVE-2026-80194 4.3 MEDIUM Kimai before 2.64.0 Missing Authorization via ProjectViewController export
CVE-2026-80197 4.3 MEDIUM Kimai before 2.57.0 Improper Authorization via Favorite Endpoints
CVE-2026-80199 3.7 LOW Kimai before 2.54.0 Username Enumeration via Timing Oracle
CVE-2026-80201 2.0 LOW Kimai before 2.53.0 API Token Leakage via Invoice Template
CVE-2026-80200 Kimai before 2.53.0 Open Redirect via RelayState

IV. Related Vulnerabilities

Same product: kimai
Same vendor: kimai
Same weakness: CWE-841

V. Comments for CVE-2026-80195

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