Detections
Analytics
CVE-2021-23436
critical
Description
This affects the package immer before 9.0.6. A type confusion vulnerability can lead to a bypass of CVE-2020-28477 when the user-provided keys used in the path parameter are arrays. In particular, this bypass is possible because the condition (p === "__proto__" || p === "constructor") in applyPatches_ returns false if p is ['__proto__'] (or ['constructor']). The === operator (strict equality operator) returns false if the operands have different type.
References
https://snyk.io/vuln/SNYK-JS-IMMER-1540542
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1579266
https://github.com/immerjs/immer/commit/fa671e55ee9bd42ae08cc239102b665a23958237