Description
npm package expr-eval is vulnerable to Prototype Pollution. An attacker with access to express eval interface can use JavaScript prototype-based inheritance model to achieve arbitrary code execution. The npm expr-eval-fork package resolves this issue.
Recommendation
Update the expr-eval-fork package to the latest compatible version. Followings are version details:
- Affected version(s): < 2.0.2
- Patched version(s): 2.0.2
References
Related Issues
- expr-eval vulnerable to Prototype Pollution - expr-eval - CVE-2025-13204
- json-schema-editor-visual vulnerable to prototype pollution - CVE-2025-57320
- Elysia vulnerable to prototype pollution with multiple standalone schema validation - CVE-2025-66456
- node-cube vulnerable to prototype pollution - CVE-2025-57348
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- Tags:
- npm
- expr-eval-fork
Anything's wrong? Let us know Last updated on November 17, 2025