CVE-2026-49276

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.

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Weakness Type (CWE)

CWE-83 CWE-83

References

Other References

https://github.com/getkirby/kirby/releases/tag/4.9.4 https://github.com/getkirby/kirby/releases/tag/5.4.4 https://github.com/getkirby/kirby/security/advisories/GHSA-rhj6-r49h-5932

Frequently Asked Questions

What is CVE-2026-49276? +

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.

How do I check if I'm vulnerable to CVE-2026-49276? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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