VULNERABILITY INTELLIGENCE

CVE-2021-23436

CVSS score5.6 MEDIUM
EPSS probability1.80%
CISA KEVNot currently listed
Published2021-09-01
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

Weakness classification

  • nvd@nist.gov: CWE-843

Primary references