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TI-2026-29237 Aliases CVE-2026-40486GHSA-qh43-xrjm-4ggp

Kimai's User Preferences API allows standard users to modify restricted attributes: hourly_rate, internal_rate

Priority MEDIUM 53CWE-915Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-915.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00267 18th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed kimai (kimai): 2.53.0kimai/kimai (Packagist): 2.53.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

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 2.53.02.53.0Patch availableCNA
—kimai/kimai (Packagist)before 2.53.02.53.0Patch availableGHSA-qh43-xrjm-4ggp
  • kimai Vendorkimai Affected before 2.53.0 Fixed in 2.53.0 Patch available CNA
  • kimai/kimai (Packagist) Vendor— Affected before 2.53.0 Fixed in 2.53.0 Patch available GHSA-qh43-xrjm-4ggp

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:kimai:kimai:*:*:*:*:*:*:*:*before 2.53.0Vulnerablekimai
  • cpe:2.3:a:kimai:kimai:*:*:*:*:*:*:*:* Versions before 2.53.0 Vulnerable ·kimai

Remediation

  • Fix · CNA kimai (kimai) Fixed in 2.53.0
  • Fix · GHSA-qh43-xrjm-4ggp kimai/kimai (Packagist) Fixed in 2.53.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40486
  2. 2026-10-03 Alias added: GHSA-qh43-xrjm-4ggp

References

Exploit 1

Advisory 1

Other 2

  • TI-2023-30240 Kimai 1.30.10 SameSite Cookie Vulnerability Session Hijacking CVSS 4.0HIGH 8.5
  • TI-2026-22900 Kimai: API invoice endpoint missing customer-level access control (IDOR) CVSS 3.1MEDIUM 6.5
  • TI-2026-30580 Kimai: Formula Injection via tag names in XLSX export CVSS 4.0MEDIUM 5.4
  • TI-2026-29230 Kimai: Stored XSS via Incomplete HTML Attribute Escaping in Team Member Widget CVSS 3.1MEDIUM 5.4
  • TI-2019-15371 Kimai 2- persistent cross-site scripting (XSS) CVSS 4.0MEDIUM 5.1
  • TI-2026-30084 Kimai: Team API Missing Object-Level Authorization CVSS 3.1LOW 3.3
See all 13 →

Sources

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