TI-2026-36766 Aliases CVE-2026-49865 GHSA-pj8j-p4g4-4vw8

Kimai has Server-Side Request Forgery in Invoice PDF Rendering via Markdown Image URLs

LOW 24CWE-918Published 2026-09-11 · Updated 2026-09-14

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

Kimai is an open-source time tracking application. Versions prior to 2.58.0 contain a server-side request forgery vulnerability in their invoice PDF preview and generation workflow. If an attacker can control Markdown content that is later rendered into an invoice PDF, such as `Customer.invoiceText`, the server-side PDF renderer will fetch remote image URLs embedded in Markdown image syntax. This allows the application server to issue outbound requests to attacker-controlled or internal targets during PDF rendering. The behavior can be used for internal network probing, server-side reachability checks, and potentially follow-on exploitation depending on deployment environment and accessible internal services. Version 2.58.0 patches the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00351 28th percentileScored 2026-11-07

Fix Fixed kimai (kimai): 2.58.0kimai/kimai (Packagist): 2.58.0

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 2.58.0	2.58.0	Patch available	CNA
—	kimai/kimai (Packagist)	before 2.58.0	2.58.0	Patch available	GHSA-pj8j-p4g4-4vw8

kimai Vendorkimai Affected before 2.58.0 Fixed in 2.58.0 Patch available CNA
kimai/kimai (Packagist) Vendor— Affected before 2.58.0 Fixed in 2.58.0 Patch available GHSA-pj8j-p4g4-4vw8

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
Fix · GHSA-pj8j-p4g4-4vw8 kimai/kimai (Packagist) Fixed in 2.58.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-49865
2026-10-03 Alias added: GHSA-pj8j-p4g4-4vw8

References

Other 2

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