TI-2026-55437 Aliases CVE-2026-80196 GHSA-vwp7-rf4h-hh34

Kimai before 2.58.0 Authentication Bypass via Password Reset Link

HIGH 77CWE-640Published 2026-08-25 · Updated 2026-10-08

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-640.

Summary

Kimai before 2.58.0 contains an authentication bypass vulnerability where password reset links remain valid after password changes because the LoginLink signature covers only the user id, not the password hash. Attackers who intercept or cache a password reset link can use it up to 2 additional times within a 1-hour window to log in as the user even after the legitimate user has changed their password.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00476 41st percentileScored 2026-11-07

Fix Fixed kimai (kimai): 2.58.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
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 2.58.0	2.58.0	Patch available	CNA

kimai Vendorkimai Affected before 2.58.0 Fixed in 2.58.0 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 2.58.0

Timeline

2026-10-02 Threatist record created from CVE-2026-80196
2026-10-03 Alias added: GHSA-vwp7-rf4h-hh34

References

Advisory 1

GitHub Security Advisory (GHSA-m492-gv72-xvxj)

TI-2023-30240 Kimai 1.30.10 SameSite Cookie Vulnerability Session Hijacking CVSS 4.0HIGH 8.5
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
TI-2026-30580 Kimai: Formula Injection via tag names in XLSX export CVSS 4.0MEDIUM 5.4

See all 46 →

Sources

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