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CVE-2026-90561

Strapi 4.x through 4.26.2 and 5.x before 5.48.1 Stored XSS via WYSIWYG

CVSS 4.0 9.3 CRITICALCVSS 3.1 8.7 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-90561

Published

Strapi versions 4.x through 4.26.2 and 5.x before 5.48.1 contain a stored cross-site scripting vulnerability in the content manager WYSIWYG preview component that fails to strip script tags from rich text. An Author-role user can store malicious script tags in rich text fields that execute in an Editor or Super Admin's session when the preview pane is expanded, enabling account takeover.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-90561

Published

strapi

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "strapi",
                    "product": "strapi",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:npm/%40strapi/strapi",
                    "versions": [
                        {
                            "version": "4.0.0",
                            "lessThanOrEqual": "4.26.2",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.0.0",
                            "lessThan": "5.48.1",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON