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 urljavascript: using simple regex, but could be bypassed with CSS unicode escapes \65xpression, null bytes, or CSS comments exp//ression. These CSS injection...