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.

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.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
getkirby kirby affected
Version Status Constraints
< 4.9.4 affected —
>= 5.0.0, < 5.4.4 affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Getkirby Subscribe
Kirby Subscribe

Project Subscriptions

Vendors Products
Getkirby Subscribe
Kirby Subscribe
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-4v4h-m2qq-ppgw Kirby: Request header injection in `Http\Remote`
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

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

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-09T20:45:03Z

Weaknesses