What is CVE-2026-124492?

CVE-2026-124492 is a high-severity vulnerability in Jihong88 Suneditor, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2026-11-08.

How severe is CVE-2026-124492?

High severity. CVSS v3 base score is 7.6 out of 10.

XSS in Jihong88 Suneditor

CVE-2026-124492

SunEditor before 3.4.0 contains a stored cross-site scripting vulnerability in ModalAnchorEditor's #createBookmarkList, which inserts entity-decoded h1-h6 header textContent into the bookmark list via innerHTML without escaping. Attackers can store HTML-encoded payloads in editor headers that execute JavaScript when a victim opens the link modal and types # in the URL input.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-11-08.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Jihong88 Suneditor

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

GitHub Security Advisory (GHSA-5pp5-5qrp-vq56) (vendor-advisory)
VulnCheck Advisory: SunEditor before 3.4.0 Stored XSS via Link Modal Bookmark List (third-party-advisory)

Frequently asked questions

What is CVE-2026-124492?: CVE-2026-124492 is a high-severity vulnerability in Jihong88 Suneditor, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2026-11-08.
How severe is CVE-2026-124492?: High severity. CVSS v3 base score is 7.6 out of 10.