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CVE-2026-50290

@asymmetric-effort/specifyjs: CSS expression sanitization is bypassable in renderToString

SpecifyJS is a declarative TypeScript user interface framework. Prior to version 0.2.136, CSS value sanitization stripped `expression(` and `url(javascript:` using simple regex, but could be bypassed with CSS unicode escapes (`\65xpression(`), null bytes, or CSS comments (`exp/**/ression(`). These CSS injection vectors only work in legacy browsers (IE6-IE10). SpecifyJS targets modern browsers. Starting in version 0.2.136, CSS sanitization now normalizes unicode escapes and strips CSS comments before pattern matching. Also checks for `behavior:`, `-moz-binding`, and `-o-link` patterns.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Asymmetric-effort
Products
Specifyjs
CVE-2026-50288

@asymmetric-effort/specifyjs: URL parse failure silently allows request

SpecifyJS is a declarative TypeScript user interface framework. Prior to version 0.2.136, when `new URL()` throws a parse error, the `assertSecureUrl` function returned without throwing, silently allowing the request to proceed without HTTPS validation. Starting in version 0.2.136, the catch block now throws an error instead of silently returning.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Asymmetric-effort
Products
Specifyjs