TI-2026-55438 Aliases CVE-2026-80197 GHSA-h76h-mxwq-v9xp

Kimai before 2.57.0 Improper Authorization via Favorite Endpoints

LOW 37CWE-639Published 2026-08-25 · Updated 2026-10-08

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

Kimai before 2.57.0 contains an improper authorization vulnerability in the favorite timesheet add and remove endpoints that allows authenticated users to manipulate other users' bookmarks. Attackers can add or remove timesheet entries from another user's favorite list by referencing their timesheet identifier, enabling cross-user business-state tampering without administrative privileges.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00264 18th percentileScored 2026-11-07

Fix Fixed kimai (kimai): 2.57.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
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

Vendor	Product	Affected versions	Fixed in	Status	Source
kimai	kimai	before 2.57.0	2.57.0	Patch available	CNA

kimai Vendorkimai Affected before 2.57.0 Fixed in 2.57.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:kimai:kimai::::::::	—	—	kimai

cpe:2.3:a:kimai:kimai:*:*:*:*:*:*:*:* Versions — — ·kimai

Remediation

Fix · CNA kimai (kimai) Fixed in 2.57.0

Timeline

2026-10-02 Threatist record created from CVE-2026-80197
2026-10-03 Alias added: GHSA-h76h-mxwq-v9xp

References

Advisory 1

GitHub Security Advisory (GHSA-j5mc-p8qg-39j7)

TI-2023-30240 Kimai 1.30.10 SameSite Cookie Vulnerability Session Hijacking CVSS 4.0HIGH 8.5
TI-2026-55437 Kimai before 2.58.0 Authentication Bypass via Password Reset Link CVSS 4.0HIGH 8.7
TI-2026-55443 Kimai before 2.56.0 Authorization Bypass via TimesheetVoter CVSS 4.0CRITICAL 9.3
TI-2026-22900 Kimai: API invoice endpoint missing customer-level access control (IDOR) CVSS 3.1MEDIUM 6.5
TI-2026-55440 Kimai before 2.54.0 Username Enumeration via Timing Oracle CVSS 4.0MEDIUM 6.3
TI-2026-37927 Incorrect authorization in kimai CVSS 4.0MEDIUM 6.3

See all 46 →

Sources

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