High 8.5Published Jul 9, 2026

CVE-2026-54002Kirby: Cross-site scripting (XSS) from incomplete HTML/XML sanitization in `Dom::sanitize()`

Updated under an hour ago (Oct 26, 2026, 9:00 PM ET)

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It affects getkirby kirby. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.5 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-79, CWE-87
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

getkirby kirby getkirby:kirby (from the name)	before 4.9.4; from 5.0.0, < 5.4.4	CNA record

References

References

https://github.com/getkirby/kirby/security/advisories/GHSA-wr9h-4r83-f4v6	x-refsource-confirm
https://github.com/getkirby/kirby/commit/0f0437b5128c910103cbc78fc34d94b2a3faef4c	x-refsource-misc
https://github.com/getkirby/kirby/commit/7ad76cf9c7387462828e6ebfc8404e31b37829e9	x-refsource-misc
https://github.com/getkirby/kirby/commit/9ec1873864441dbc06479ef7823da348ec7f2700	x-refsource-misc
https://github.com/getkirby/kirby/commit/bb2562e16c754493a403b8df84c9883108871e4c	x-refsource-misc
https://github.com/getkirby/kirby/releases/tag/4.9.4	x-refsource-misc
https://github.com/getkirby/kirby/releases/tag/5.4.4	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.