CVE-2026-40486 json
Kimai's User Preferences API allows standard users to modify restricted attributes: hourly_rate, internal_rate
published 2026-04-15 6 mo ago modified 2026-06-17 4 mo ago also GHSA-qh43-xrjm-4ggp , EUVD-2026-23576
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
Kimai is an open-source time tracking application. In versions 2.52.0 and below, the User Preferences API endpoint (PATCH /api/users/{id}/preferences) applies submitted preference values without checking the isEnabled() flag on preference objects. Although the hourly_rate and internal_rate fields are correctly marked as disabled for users lacking the hourly-rate role permission, the API ignores this restriction and saves the values directly. Any authenticated user can modify their own billing rates through this endpoint, resulting in unauthorized financial tampering affecting invoices and timesheet calculations. This issue has been fixed in version 2.53.0.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 6 mo ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/kimai/kimai/security/advisories/GHSA-qh43-xrjm-4ggp referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | kimai/kimai | <2.53.0 |
2.53.0 |
Affected products
- kimai kimai
Classification
- Weakness
-
- CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
References
-
github.com
/kimai/kimai/security/advisories/GHSA-qh43-xrjm-4ggp
web, exploit, vendor-advisory
-
github.com
/kimai/kimai/releases/tag/2.53.0
web, product, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-40486
advisory
-
github.com
/kimai/kimai
package
Sources
- CVE List CVE-2026-40486
- GitHub Advisory GHSA-qh43-xrjm-4ggp
- NVD CVE-2026-40486
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