High severityNVD Advisory· Published Jul 9, 2026· Updated Jul 10, 2026
CVE-2026-54002
CVE-2026-54002
Description
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites and plugins that use the writer or list fields or call Dom::sanitize(), Sane::sanitize(), Sane::Html::sanitize(), Sane::Svg::sanitize(), Sane::Xml::sanitize(), Sane::sanitizeFile(), or file sanitizeContents() with untrusted input allow malicious markup injected as children of an unknown HTML or XML tag to pass through Dom::sanitize() without being correctly sanitized, causing stored cross-site scripting. This issue is fixed in versions 4.9.4 and 5.4.4.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
getkirby/cmsPackagist | < 4.9.4 | 4.9.4 |
getkirby/cmsPackagist | >= 5.0.0-alpha.1, < 5.4.4 | 5.4.4 |
Affected products
1Patches
Vulnerability mechanics
References
8- github.com/advisories/GHSA-wr9h-4r83-f4v6ghsaADVISORY
- github.com/getkirby/kirby/releases/tag/4.9.4nvdWEB
- github.com/getkirby/kirby/releases/tag/5.4.4nvdWEB
- github.com/getkirby/kirby/security/advisories/GHSA-wr9h-4r83-f4v6nvdWEB
- github.com/getkirby/kirby/commit/0f0437b5128c910103cbc78fc34d94b2a3faef4cnvd
- github.com/getkirby/kirby/commit/7ad76cf9c7387462828e6ebfc8404e31b37829e9nvd
- github.com/getkirby/kirby/commit/9ec1873864441dbc06479ef7823da348ec7f2700nvd
- github.com/getkirby/kirby/commit/bb2562e16c754493a403b8df84c9883108871e4cnvd
News mentions
1- Kirby CMS: Seven Bugs Patched in One Advisory, Including Critical Auth BypassVypr Intelligence · Jun 18, 2026