Vulnerability library
Security checkNovember 17, 2025

expr-eval vulnerable to Prototype Pollution - expr-eval

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High severitynpmexpr-eval

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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

No fix is available yet. Followings are affected versions:

  • <= 2.0.2

References

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