Medium 5.3Published Oct 20, 2026

CVE-2026-113650ApostropheCMS sanitize-html: unbounded recursion when re-sanitizing the fallback of a discarded iframe (stack overflow, nestingLimit not enforced)

Updated under an hour ago (Oct 28, 2026, 11:23 AM ET)

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Exploited in the last 30 days

ApostropheCMS is an open-source Node.js content management system. In sanitize-html 2.18.0, when an <iframe> is not allowed and disallowedTagsMode is 'discard' (the defaults), its raw-text content is re-sanitized by a recursive call to sanitizeHtml(text, options). The recursion has no bound and starts each nested call with a fresh state. This vulnerability is fixed in 2.18.1.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-674
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: Oct 28, 2026
First seen by InfoSec Signals: Oct 20, 2026

Affected products

Affected products

apostrophecms apostrophe apostrophecms:apostrophe (from the name)	before 4.34.0	CNA record
apostrophecms sanitize-html apostrophecms:sanitize_html (from the name)	from 2.18.0, < 2.18.1	CNA record

References

References

https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-c9rx-x947-fp3h	x-refsource-confirm
https://github.com/apostrophecms/apostrophe/commit/06e4b377f3c360f9e89c32dccd7e505ad5ddf498	x-refsource-misc
https://github.com/apostrophecms/apostrophe/commit/40b989b1a9dd23d30029b8ce7668634265cfe5ea	x-refsource-misc
https://github.com/apostrophecms/apostrophe/releases/tag/sanitize-html@2.18.1	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.