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TI-2026-55436 Aliases CVE-2026-80195GHSA-fcv9-h6ph-8mrc

Kimai before 2.63.0 Team Membership Removal via API

Priority MEDIUM 40CWE-841Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00356 29th percentileScored 2026-11-07
Fix Fixed kimai (kimai): 2.63.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
kimaikimaibefore 2.63.02.63.0Patch availableCNA
  • kimai Vendorkimai Affected before 2.63.0 Fixed in 2.63.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:kimai:kimai:*:*:*:*:*:*:*:*——kimai
  • cpe:2.3:a:kimai:kimai:*:*:*:*:*:*:*:* Versions — — ·kimai

Remediation

  • Fix · CNA kimai (kimai) Fixed in 2.63.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-80195
  2. 2026-10-03 Alias added: GHSA-fcv9-h6ph-8mrc

References

Advisory 1

  • TI-2023-30240 Kimai 1.30.10 SameSite Cookie Vulnerability Session Hijacking CVSS 4.0HIGH 8.5
  • TI-2026-55437 Kimai before 2.58.0 Authentication Bypass via Password Reset Link CVSS 4.0HIGH 8.7
  • TI-2026-55443 Kimai before 2.56.0 Authorization Bypass via TimesheetVoter CVSS 4.0CRITICAL 9.3
  • TI-2026-22900 Kimai: API invoice endpoint missing customer-level access control (IDOR) CVSS 3.1MEDIUM 6.5
  • TI-2026-55440 Kimai before 2.54.0 Username Enumeration via Timing Oracle CVSS 4.0MEDIUM 6.3
  • TI-2026-37927 Incorrect authorization in kimai CVSS 4.0MEDIUM 6.3
See all 46 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences