PT-2026-48990 · Apostrophecms · Sanitize-Html

Published 2026-06-12 · Updated 2026-06-12 · CVE-2026-53606

Mitre

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. Versions of sanitize-html prior to 2.17.5 use allowedSchemesAppliedToAttributes (default: ['href', 'src', 'cite']) to gate the naughtyHref() function that blocks dangerous URI schemes like javascript: and vbscript:. The HTML specification defines 10+ attributes that accept URIs (action, formaction, data, poster, background, ping, xlink:href, dynsrc, lowsrc), but none of these are included in the default gate list. When a developer allows any of these attributes in their configuration, javascript: URIs pass through completely unmodified, enabling XSS. Version 2.17.5 patches the issue.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-53606

Affected Products

Sanitize-Html

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-53606 · Security Note
• https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vccv-cmxp-4j9h · Note