---
id: CVE-2026-113650
title: >-
  ApostropheCMS sanitize-html: unbounded recursion when re-sanitizing the
  fallback of a discarded iframe (stack overflow, nestingLimit not enforced)
summary: >-
  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 s…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cvssSource: cna
cwe:
  - CWE-674
vendor: apostrophecms
product: apostrophe
affected:
  - apostrophe < 4.34.0
  - 'sanitize-html >= 2.18.0, < 2.18.1'
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T16:19:12.100Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-113650'
references:
  - url: >-
      https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-c9rx-x947-fp3h
    label: >-
      https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-c9rx-x947-fp3h
  - url: >-
      https://github.com/apostrophecms/apostrophe/commit/06e4b377f3c360f9e89c32dccd7e505ad5ddf498
    label: >-
      https://github.com/apostrophecms/apostrophe/commit/06e4b377f3c360f9e89c32dccd7e505ad5ddf498
  - url: >-
      https://github.com/apostrophecms/apostrophe/commit/40b989b1a9dd23d30029b8ce7668634265cfe5ea
    label: >-
      https://github.com/apostrophecms/apostrophe/commit/40b989b1a9dd23d30029b8ce7668634265cfe5ea
  - url: >-
      https://github.com/apostrophecms/apostrophe/releases/tag/sanitize-html@2.18.1
    label: >-
      https://github.com/apostrophecms/apostrophe/releases/tag/sanitize-html@2.18.1
tags:
  - cve.org
ingestedAt: '2026-10-20T17:12:53.603Z'
---

## Overview

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.

## Affected

- `apostrophe < 4.34.0`
- `sanitize-html >= 2.18.0, < 2.18.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.