# CVE-2026-54002

## Summary

- **CVE ID:** CVE-2026-54002
- **Severity:** HIGH
- **CVSS Score:** 8.5 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-79, CWE-87
- **Published:** Jul 9, 2026
- **Last Modified:** Jul 10, 2026

## 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.

## Affected Products

- getkirby — kirby (< 4.9.4)
- getkirby — kirby (>= 5.0.0, < 5.4.4)

## References

- [CNA](https://github.com/getkirby/kirby/security/advisories/GHSA-wr9h-4r83-f4v6)
- [CNA](https://github.com/getkirby/kirby/commit/0f0437b5128c910103cbc78fc34d94b2a3faef4c)
- [CNA](https://github.com/getkirby/kirby/commit/7ad76cf9c7387462828e6ebfc8404e31b37829e9)
- [CNA](https://github.com/getkirby/kirby/commit/9ec1873864441dbc06479ef7823da348ec7f2700)
- [CNA](https://github.com/getkirby/kirby/commit/bb2562e16c754493a403b8df84c9883108871e4c)
- [CNA](https://github.com/getkirby/kirby/releases/tag/4.9.4)
- [CNA](https://github.com/getkirby/kirby/releases/tag/5.4.4)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.55%
- **EPSS Percentile:** 44.0

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._