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
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See something that needs correcting? Let us knowUpdated November 17, 2025