Medium severity6.1NVD Advisory· Published Aug 17, 2026· Updated Sep 9, 2026
CVE-2026-63670
CVE-2026-63670
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
sanitize-htmlnpm | < 2.17.6 | 2.17.6 |
Affected products
1- Range: <2.17.6
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-jxwj-j7wr-gfrwghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-63670ghsaADVISORY
- github.com/apostrophecms/apostrophe/commit/eae1fb2b72ec5d1c27d0977509c6482a0408f725nvdWEB
- github.com/apostrophecms/apostrophe/pull/5501nvdWEB
- github.com/apostrophecms/apostrophe/security/advisories/GHSA-jxwj-j7wr-gfrwnvdWEB
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