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 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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/apostrophecms/apostrophe/commit/eae1fb2b72ec5d1c27d0977509c6482a0408f725
https://github.com/apostrophecms/apostrophe/pull/5501
https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-jxwj-j7wr-gfrw
https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-jxwj-j7wr-gfrw

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-17 20:16

Updated : 2026-09-09 21:11

NVD link : CVE-2026-63670

Mitre link : CVE-2026-63670

CVE.ORG link : CVE-2026-63670

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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