CVE-2026-12866
All versions of the package expr-eval are vulnerable to Code Execution via the toJSFunction() API. An attacker can execute arbitrary JavaScr
CVSS
9.8
Crítico
EPSS
0.5%
p38
KEV
—
Exploit Today
11
0-100
Publicado: 23 jun 2026 · Última mod.: 7 jul 2026 · CWE-94
0.5%EPSS · 30 días0.5%
2026-06-302026-07-17
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.
- github.comhttps://github.com/silentmatt/expr-eval/blob/master/src/expression.js%23L55
- github.comhttps://github.com/silentmatt/expr-eval/issues/292
- security.snyk.iohttps://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-17662018
- security.snyk.iohttps://security.snyk.io/vuln/SNYK-JS-EXPREVAL-15054690
- security.snyk.iohttps://security.snyk.io/vuln/SNYK-JS-EXPREVAL-15054690
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