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.

Metrics

Attack Vector Network

Attack Complexity High

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact High

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Getkirby
  • Kirby

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References
Link Providers
https://github.com/getkirby/kirby/commit/aa33414e1669e866cdd6f4decfae2a669e8bb828 cve-icon
https://github.com/getkirby/kirby/commit/fad9cbd22c73ed0fbd3aaf62310a8dcacfc007cd cve-icon
https://github.com/getkirby/kirby/releases/tag/4.9.4 cve-icon
https://github.com/getkirby/kirby/releases/tag/5.4.4 cve-icon
https://github.com/getkirby/kirby/security/advisories/GHSA-4v4h-m2qq-ppgw cve-icon
History

Thu, 09 Jul 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Getkirby
Getkirby kirby
Vendors & Products Getkirby
Getkirby kirby

Thu, 09 Jul 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 09 Jul 2026 19:15:00 +0000

Type Values Removed Values Added
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.
Title Kirby: Request header injection in `Http\Remote`
Weaknesses CWE-113
CWE-93
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-07-09T18:44:56.901Z

Updated: 2026-07-09T19:20:56.407Z

Reserved: 2026-06-03T22:05:13.645Z

Link: CVE-2026-50188

cve-icon Vulnrichment

Updated: 2026-07-09T19:20:43.782Z

cve-icon NVD

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cve-icon Redhat

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