What’s Vulnerable › Vulnerabilities

CVE-2026-52826: Kimai: Improper Authorization in Kimai Project, Customer, and Activity Rate Edit Endpoints Allows Cross-Scope Rate Manipulation

• Severity: medium (CVSS 5.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-15 · updated 2026-09-23
• Weakness: CWE-285

Description

Kimai is an open-source time tracking application. Prior to 2.57.0, GET or POST requests to /en/admin/project/{id}/rate/{rate}, /en/admin/customer/{id}/rate/{rate}, and /en/admin/activity/{id}/rate/{rate} independently resolve the authorized parent identifier and the attacker-selected child rate identifier without confirming that the ProjectRate, CustomerRate, or ActivityRate belongs to that parent. An authenticated user who can edit one parent object can pair it with a rate record from an unauthorized project, customer, or activity and persist changes to billing configuration in kimai2_projects_rates, kimai2_customers_rates, or kimai2_activities_rates. This issue is fixed in version 2.57.0.

Affected products

• kimai: before 2.57.0

References

• https://github.com/kimai/kimai/commit/976d38e8a4485a1c923ee7b5841849e91a06e849
• https://github.com/kimai/kimai/pull/5929
• https://github.com/kimai/kimai/releases/tag/2.57.0
• https://github.com/kimai/kimai/security/advisories/GHSA-2xgg-2x8h-8xw4
• https://www.kimai.org/en/security/ghsa-2xgg-2x8h-8xw4

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