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Vulnerability record · CVE-2026-80195 · published 26 August 2026

CVE-2026-80195: Kimai before 2.63.0 contains a business logic / improper authorization vulnerability in the team update API en…

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.

8.7 CVSS 4.0 High EPSS 0.36% · top 73.3% CWE-841 · CWE-841 Deferred
8.7CVSS 4.0 base score
0.36%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
3 Sep 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/kimai/kimai/security/advisories/GHSA-6rxf-4hh9-pp46
https://www.vulncheck.com/advisories/kimai-before-2.63.0-team-membership-removal-via-api

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Source: NIST National Vulnerability Database (record CVE-2026-80195), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.