Vulnerability · Published Sep 11, 2026 · Assigned by GitHub_M

CVE-2026-49865Kimai has Server-Side Request Forgery in Invoice PDF Rendering via Markdown Image URLs

Medium 5.3

In plain English

A medium-severity server-side request forgery in kimai from kimai. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.4%top 71.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	kimai/kimai	2.58.0	GHSA-pj8j-p4g4-4vw8

Affected products (as reported)

Vendor	Product	Versions
kimai	kimai	< 2.58.0

Weakness: CWE-918 · 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

References

https://github.com/kimai/kimai/security/advisories/GHSA-pj8j-p4g4-4vw8 x_refsource_CONFIRM