CVE-2021-23434: Access of Resource Using Incompatible Type (Type Confusion)

August 27, 2021 (updated January 30, 2023)

A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === '__proto__' returns false if currentPath is ['__proto__']. This is because the === operator returns always false when the type of the operands is different.

References

nvd.nist.gov/vuln/detail/CVE-2021-23434

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