CVE-2021-23470: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

February 4, 2022 (updated February 9, 2022)

This affects the package putil-merge The merge() function does not check the values passed into the argument. An attacker can supply a malicious value by adjusting the value to include the constructor property. Note: This vulnerability derives from an incomplete fix in https://security.snyk.io/vuln/SNYK-JS-PUTILMERGE-1317077

References

github.com/panates/putil-merge/commit/476d00078dfb2827d7c9ee0f2392c81b864f7bc5
nvd.nist.gov/vuln/detail/CVE-2021-23470
snyk.io/vuln/SNYK-JS-PUTILMERGE-2391487

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