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.

Project Subscriptions

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-pj8j-p4g4-4vw8 Kimai has Server-Side Request Forgery in Invoice PDF Rendering via Markdown Image URLs
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Kimai has Server-Side Request Forgery in Invoice PDF Rendering via Markdown Image URLs
Weaknesses CWE-918
References
Metrics cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-11T21:08:47.179Z

Reserved: 2026-06-01T22:03:19.641Z

Link: CVE-2026-49865

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-11T21:17:10.783

Modified: 2026-09-11T21:17:10.783

Link: CVE-2026-49865

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-12T05:45:09Z

Weaknesses