CVE-2026-49276
High
Description
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites using the writer field in any blueprint allowed a scripting link to be included as the target of a link or email link in writer mark components, making the target clickable by the user who entered it and enabling self cross-site scripting in the Panel. This issue is fixed in versions 4.9.4 and 5.4.4.
SeverityHigh
CVSS7.4
Exploit probability—
ProductGetkirby/cms
PublishedJul 9, 2026
First seenJul 9, 2026
Weakness typeCWE-83CWE-83
How to fix
Update
- getkirby/cms4.9.4, 5.4.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| getkirby/cmsPackagist | v < 4.9.4, 5.0.0-alpha.1 ≤ v < 5.4.4 | 4.9.4, 5.4.4 |
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