En resumen
- CVE-2026-12866 es una vulnerabilidad CRÍTICO (CVSS 9.8) que afecta a org.webjars.npm:expr-eval, expr-eval.
- Probabilidad de explotación en los próximos 30 días (EPSS): 0.87%, mayor que el 58.7% de las vulnerabilidades.
- Aún no hay una versión corregida: sigue el aviso del fabricante en Referencias.
Description
All versions of the package expr-eval are vulnerable to Code Execution via the toJSFunction() API. An attacker can execute arbitrary JavaScript by supplying crafted expressions that are compiled into native code using new Function(). Because user-controlled expressions are transformed directly into executable JavaScript, attackers can escape the intended expression sandbox and run arbitrary code within the application's context.
NVD description
All versions of the package expr-eval are vulnerable to Code Execution via the toJSFunction() API. An attacker can execute arbitrary JavaScript by supplying crafted expressions that are compiled into native code using new Function(). Because user-controlled expressions are transformed directly into executable JavaScript, attackers can escape the intended expression sandbox and run arbitrary code within the application's context.
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