CVE-2026-63670: ApostropheCMS is an open-source Node.js content management system. Prior to 2.17.6, sanitizeHtml() can pass disallowed executable markup through…

PriorityP429medium6.1CVSS 3.1

AVNACLPRNUIRSCCLILAN

EPSS

0.33%

23.5th percentile

ApostropheCMS is an open-source Node.js content management system. Prior to 2.17.6, sanitizeHtml() can pass disallowed executable markup through packages/sanitize-html/index.js when textarea or xmp is included in allowedTags because a literal solidus after the raw-text end-tag name is treated as text by htmlparser2 and the ontext handler emits that content without escaping, while a browser parses the following img onerror markup as active HTML. This issue is fixed in version 2.17.6.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
apostrophecms	apostrophe	< 2.17.6	2.17.6
apostrophecms	sanitize-html	>= 0 < 2.17.6	2.17.6

CVSS provenance

nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

ghsa6.1MEDIUM

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