Vulnerability · Published Sep 2, 2026 · Assigned by VulnCheck

CVE-2026-84806Kimai before 2.63.0 Authorization Bypass via Team Access Endpoints

Medium 5.4

In plain English

A medium-severity incorrect permission assignment in kimai from kimai. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 84.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Kimai before 2.63.0 contains an improper authorization vulnerability in team access endpoints that allows authenticated users with team edit permissions and read-only access to grant team access to customers, projects, or activities. Attackers can exploit insufficient permission checks by sending POST requests to team access endpoints to modify access control lists for entities they should not be able to modify.

Affected products (as reported)

Vendor	Product	Versions
kimai	kimai	0 – before 2.63.0

Weakness: CWE-732 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References

GitHub Security Advisory (GHSA-gmm9-hfxg-7v29) vendor-advisory
VulnCheck Advisory: Kimai before 2.63.0 Authorization Bypass via Team Access Endpoints third-party-advisory