Quick answers
- Is CVE-2026-124492 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-124492 being exploited in the wild.
- How severe is CVE-2026-124492?
- High severity, with a CVSS score of 7.6, published 8 November 2026.
- Which products and versions are affected?
- JiHong88 SunEditor before 3.4.0.
- Is there a fix for CVE-2026-124492?
- Yes: fixed in 3.4.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-124492 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-124492?
- Check whether you run JiHong88 SunEditor at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 3.4.0
Technical details
The ModalAnchorEditor.#createBookmarkList method reads h1-h6 header elements' textContent (which is HTML-decoded plain text) and inserts it directly into an HTML template via innerHTML without escaping. An attacker can store HTML-encoded payloads (e.g., <img src=x onerror=alert(1)>) in editor headers; when a user opens the link modal and types # to create bookmark links, the decoded text is re-interpreted as HTML and executed. Stored XSS requires prior editor access and user interaction (opening link modal), but no authentication bypass is needed.
Affected products
- JiHong88 SunEditor before 3.4.0
Timeline
- 2026-10-23: disclosed
- 2026-11-08: advisory