CVE-2026-54606

HIGHPre-NVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 72% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
8.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

SunEditor is a lightweight and powerful WYSIWYG editor in vanilla JavaScript with no dependencies. Prior to 3.1.4, the SunEditor Embed plugin in src/plugins/modal/embed.js parses attacker-controlled raw embed HTML with DOMParser and processes the resulting DOM nodes. When an external script element follows a valid iframe, the plugin recreates a script element from the attacker-controlled src attribute and appends it to the live DOM, causing JavaScript execution in the editor page. If an application stores or reflects SunEditor content without additional backend sanitization, an attacker who can submit embed HTML can trigger stored or reflected cross-site scripting when another user opens, previews, renders, or edits the content, enabling access to page data and account actions as the victim. This issue is fixed in version 3.1.4.

CVSS v3
8.5
EG Score
8.5(medium)
EG Risk
54(Track*)
EG Risk 54/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity85% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

August 26, 2026

Last Modified

August 26, 2026

Advisory Details (4)

Auto-updated Aug 26, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github.
github Patch Available🟡 PoC Available

DOM XSS in SunEditor Embed Plugin via External Script Element After Iframe Embed · Advisory · JiHong88/suneditor · GitHub

https://github.com/JiHong88/suneditor/security/advisories/GHSA-w93q-cq9w-58p7
github_release Patch Available

v3.1.4

Patch available: JiHong88/suneditor 3.1.4

https://github.com/JiHong88/suneditor/releases/tag/3.1.4
generic🟡 PoC Available

[Security][v3.1.3] Critical XSS vulnerability - sanitizer bypass · Issue #1649 · JiHong88/suneditor · GitHub

https://github.com/JiHong88/suneditor/issues/1649
github_commit Patch Available

commit 9d43a5e08210 (JiHong88/suneditor)

Patch available: JiHong88/suneditor 3.1.4 (contains commit 9d43a5e08210)

https://github.com/JiHong88/suneditor/commit/9d43a5e082101d2d6475cba86e0d58d7c2cf6677

Vendor Advisories for CVE-2026-54606(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 10× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 03:09 UTCEG score recompute
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-27 18:04 UTCEG score recompute
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-26 19:22 UTCEG score recompute
  7. 2026-08-26 18:41 UTCEG score recompute
  8. 2026-08-26 16:37 UTCEG score recompute▲ 8.50
  9. 2026-08-26 16:37 UTCNVD updateCVSS v3 → 8.5 · CVSS v4 → 8.5
  10. 2026-08-26 15:27 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54606?
CVE-2026-54606 is a high vulnerability published on August 26, 2026. SunEditor is a lightweight and powerful WYSIWYG editor in vanilla JavaScript with no dependencies. Prior to 3.1.4, the SunEditor Embed plugin in src/plugins/modal/embed.js parses attacker-controlled raw embed HTML with DOMParser and processes the resulting DOM nodes. When an external script element…
When was CVE-2026-54606 disclosed?
CVE-2026-54606 was first published in the National Vulnerability Database on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54606 actively exploited?
CVE-2026-54606 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 71.9% of all scored CVEs.
What is the CVSS score of CVE-2026-54606?
CVE-2026-54606 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-54606?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54606, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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