getkirby Kirby up to 4.9.3/5.4.3 Http Remote Class request/get/post header missing initialization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.0$0-$5k1.13

Summaryinfo

A vulnerability described as critical has been identified in getkirby Kirby up to 4.9.3/5.4.3. This impacts the function request/get/post of the component Http Remote Class. The manipulation of the argument header results in missing initialization. This vulnerability was named CVE-2026-50188. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in getkirby Kirby up to 4.9.3/5.4.3. Affected is the function request/get/post of the component Http Remote Class. The manipulation of the argument header with an unknown input leads to a missing initialization vulnerability. CWE is classifying the issue as CWE-456. The product does not initialize critical variables, which causes the execution environment to use unexpected values. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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 advisory is available at github.com. This vulnerability is traded as CVE-2026-50188 since 06/04/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

Upgrading to version 4.9.4 or 5.4.4 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing initialization
CWE: CWE-456 / CWE-453
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Kirby 4.9.4/5.4.4

Timelineinfo

06/04/2026 CVE reserved
07/09/2026 +35 days Advisory disclosed
07/09/2026 +0 days VulDB entry created
07/09/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-50188 (🔒)
GCVE (CVE): GCVE-0-2026-50188
GCVE (VulDB): GCVE-100-377298

Entryinfo

Created: 07/09/2026 21:51
Changes: 07/09/2026 21:51 (55)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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