CVE-2021-23434

Prototype Pollution

HIGH
8.6
CVSS Score
Published: August 27, 2021 at 04:50 PM UTC
Updated: June 17, 2026 at 03:38 AM UTC
2 products affected across 2 vendorsDebian LinuxObject Path

Using object-path by N/A?

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Severity
HIGH8.6
Exploit prediction
EPSS 2%

Description

This affects the package object-path before 0.11.6. 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.11.6
Affected range stops below 0.11.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-843

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