ApostropheCMS sanitize-html: SMIL animation namespace-prefix bypass allows javascript: URI injection (XSS)

影響: npm:sanitize-html >= 2.17.7, < 2.18.0 → 2.18.0

sanitize-html 2.17.7 introduced animatesUrlAttribute() to block SVG animation elements (animate, animateColor, animateMotion, animateTransform, set) when their attributeName targets a URL sink like href. However, this check is bypassed when the animation element uses a namespace prefix (e.g., svg:animate instead of animate). Root Cause The animatesUrlAttribute function (index.js, line ~832) checks svgAnimationTags.indexOf(name.toLowerCase()), where svgAnimationTags contains bare local n…

GitHub Advisory Databaseで読む

2026/10/21 03:21、GitHub Advisory Databaseが「ApostropheCMS sanitize-html: SMIL animation namespace-prefix bypass allows javascript: URI injection (XSS)」を公開しました (種別: 脆弱性アドバイザリ)。重大度は「注意」(low) です。関連する技術: JavaScript / Node.js。CVE: CVE-2026-113657。