Answer in brief
CVE-2026-56383 records a Medium severity (CVSS 4.6) vulnerability in Craft CMS - Stored XSS in Table Field via Row Heading Column Type. 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 | >=4.5.0-beta.1,<=4.16.18 | 4.16.19 |
| craftcms/cmscomposer | >=5.0.0-RC1,<=5.8.22 | 5.8.23 |
| craftcms/cmsgeneric | >=4.5.0-beta.1 <4.16.19 || >=5.0.0-RC1 <5.8.23 | 4.16.19, 5.8.23 |
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 contains a stored cross-site scripting (XSS) vulnerability in the editableTable.twig component when using the 'Row Heading' column type. The application fails to sanitize input within row heading default values, allowing an attacker with an administrator account (with allowAdminChanges enabled) to inject arbitrary JavaScript that executes when another user views a page containing the affected table field. Affected versions are >= 4.5.0-beta.1 through 4.16.18 and >= 5.0.0-RC1 through 5.8.22; fixed in 4.16.19 and 5.8.23.
Quoted source text, attributed separately from HOL analysis.