Vulnerability Description
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites and plugins using the Kirby Http Remote class, including Remote::request(), Remote::get(), and Remote::post(), to send outgoing HTTP requests with untrusted data in the headers option could allow newline characters in a header value to inject a separate unintended request header to the remote service. This issue is fixed in versions 4.9.4 and 5.4.4.
Related Weaknesses (CWE)
References
- https://github.com/getkirby/kirby/commit/aa33414e1669e866cdd6f4decfae2a669e8bb82
- https://github.com/getkirby/kirby/commit/fad9cbd22c73ed0fbd3aaf62310a8dcacfc007c
- https://github.com/getkirby/kirby/releases/tag/4.9.4
- https://github.com/getkirby/kirby/releases/tag/5.4.4
- https://github.com/getkirby/kirby/security/advisories/GHSA-4v4h-m2qq-ppgw
FAQ
What is CVE-2026-50188?
CVE-2026-50188 is a documented vulnerability. Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites and plugins using the Kirby Http Remote class, including Remote::request(), Remote::get(), and Remote::post(), ...
How severe is CVE-2026-50188?
CVSS scoring is not yet available for CVE-2026-50188. Check NVD for updates.
Is there a patch for CVE-2026-50188?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.