CVE-2026-50188CWE-113CWE-93

Kirby: Request header injection in `Http\Remote`

Medium · published July 9, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
37.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
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
EPSS
0.00443 · 37.5th percentile
Weaknesses
CWE-113 · Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting'); CWE-93 · Improper Neutralization of CRLF Sequences ('CRLF Injection')
Published
2026-07-09T18:44Z
EPSS history
Timeline
  • 09 JUL 18:44Z
    Kirby: Request header injection in `Http\Remote`
    cvelistv5