Answer in brief
CVE-2026-56393 records a Medium severity (CVSS 4.6) vulnerability in Craft CMS - Multiple Stored Cross-Site Scripting in Settings Names and Field Options. The current sources do not mark it as known exploited. The current feed maps craftcms/cms (composer), craftcms/cms (composer), craftcms/cms (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 4.6. 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.
The current feed maps craftcms/cms (composer), craftcms/cms (composer), craftcms/cms (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| craftcms/cmscomposer | >=5.0.0-RC1,<5.9.0-beta.1 | 5.9.0-beta.1 |
| craftcms/cmscomposer | >=4.0.0-RC1,<4.17.0-beta.1 | 4.17.0-beta.1 |
| craftcms/cmsgeneric | >=5.0.0-RC1 <5.9.0-beta.1 || >=4.0.0-RC1 <4.17.0-beta.1 | 5.9.0-beta.1, 4.17.0-beta.1 |
Published upstream
Jun 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 21, 2026
Craft CMS 4.x (>= 4.0.0-RC1, < 4.17.0-beta.1) and 5.x (>= 5.0.0-RC1, < 5.9.0-beta.1) contain multiple stored cross-site scripting vulnerabilities where settings names and field option labels are rendered without sanitization (e.g., via the checkbox.twig template, which used {{ label|raw }}). An authenticated administrator (with allowAdminChanges enabled) can inject malicious payloads into section names, volume names, user group names, global set names, generated field names, checkbox/radio option labels, and custom source labels, causing arbitrary JavaScript to execute in other users' control-panel sessions. Fixed in 4.17.0-beta.1 and 5.9.0-beta.1.
Quoted source text, attributed separately from HOL analysis.