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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.

Kimai是Kimai团队开源的一款项目管理系统。 Kimai 2.63.0之前版本存在处理逻辑错误漏洞，该漏洞源于团队更新API端点（PATCH /api/teams/{id}）存在业务逻辑/授权不当问题，在验证提交的替换成员列表之前删除所有现有团队成员，可能导致已认证的团队负责人或其他具有编辑权限的用户提交恶意成员payload，绕过删除团队负责人的保护，使团队无成员或负责人，破坏基于团队的访问控制。

CVSS 5.4 · Medium EPSS 0.36% · P27

Affected Version Matrix 2

VendorProduct Version RangeStatus
kimai kimai < 2.63.0 affected
2.63.0 unaffected
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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
Vulnerability Title
Kimai 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kimai是Kimai团队开源的一款项目管理系统。 Kimai 2.63.0之前版本存在处理逻辑错误漏洞，该漏洞源于团队更新API端点（PATCH /api/teams/{id}）存在业务逻辑/授权不当问题，在验证提交的替换成员列表之前删除所有现有团队成员，可能导致已认证的团队负责人或其他具有编辑权限的用户提交恶意成员payload，绕过删除团队负责人的保护，使团队无成员或负责人，破坏基于团队的访问控制。
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
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-2026-80200 4.7 MEDIUM Kimai before 2.53.0 Open Redirect via RelayState
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

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-80195

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