CVE-2021-23436
Medium
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.
SeverityMedium
CVSS5.6
Exploit probability—
ProductImmer
PublishedSep 1, 2021
First seenSep 1, 2021
How to fix
Update
- immer_project immer9.0.6 or later
- immer9.0.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| immer_project immer | v < 9.0.6 | 9.0.6 |
| immernpm | 7.0.0 ≤ v < 9.0.6 | 9.0.6 |
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