CVE-2026-124494 json
SunEditor before 3.4.0 Stored XSS via : Entity Sanitizer Bypass
published 19d ago modified yesterday also EUVD-2026-119549 , GHSA-v4jx-8pj6-w4w8
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository JiHong88/suneditor. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 9.3
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 28%
- public exploits
- 0
- none known
Summary
SunEditor before 3.4.0 contains a stored cross-site scripting vulnerability because the html.clean() sanitizer's _normalizeURL() function decodes named entities like : to an empty string. Attackers can inject href values such as javascript: that pass the _isSafeURL() check but are decoded by browsers, executing JavaScript when victims click stored links.
Patch / fix
- npm suneditor 3.4.0
- JiHong88 suneditor 3.4.0
Is CVE-2026-124494 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- yesterday
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N |
| CNA | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | suneditor | <=3.3.1 |
3.4.0 |
Affected products
- JiHong88 suneditor
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/JiHong88/suneditor/security/advisories/GHSA-v4jx-8pj6-w4w8
vendor-advisory, advisory
-
vulncheck.com
/advisories/suneditor-before-3.4.0-stored-xss-via-colon-entity-sanitizer-bypass
third-party-advisory
Sources
- CVE List CVE-2026-124494
- NVD CVE-2026-124494
- Maintainer advisory GHSA-v4jx-8pj6-w4w8
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of JiHong88/suneditor published their own advisory on GitHub. Reviewed sources take precedence over it.