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  4. CVE 2026 124422 suneditor 300 before 340 stored xss via htmlclean
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Back to active CVEs
Medium · CVSS 5.3CVE-2026-124422

SunEditor 3.0.0 before 3.4.0 Stored XSS via html.clean() Iframe PlaceholderCVE-2026-124422

Answer in brief

CVE-2026-124422 records a Medium severity (CVSS 5.3) vulnerability in SunEditor 3.0.0 before 3.4.0 Stored XSS via html.clean() Iframe Placeholder. The current sources do not mark it as known exploited. The current feed maps jihong88/suneditor (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 8, 2026Updated Nov 8, 2026Source checked Nov 8, 2026First seen by HOL Nov 8, 2026Material review Nov 8, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps jihong88/suneditor (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
jihong88/suneditorgeneric>=3.0.0 <3.4.03.4.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for jihong88/suneditor.
  2. 2Review the reported fix. Update jihong88/suneditor to 3.4.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 8, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

SunEditor from 3.0.0 before 3.4.0 contains a stored cross-site scripting vulnerability in html.clean() that rebuilds iframes from data-se-iframe-holder-attrs JSON without filtering srcdoc or uppercase SRC keys. Attackers can inject crafted HTML through paste, html.set, or html.insert to execute script in the host page origin when victims load or paste the content.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Nov 8, 2026
References
5 linked sources
Open source record