CVE-2021-32736: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in think-helper

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-30 · updated 2026-06-17
Weakness: CWE-1321

Description

think-helper defines a set of helper functions for ThinkJS. In versions of think-helper prior to 1.1.3, the software receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. The vulnerability is patched in version 1.1.3.

Affected products

thinkjs think-helper: before 1.1.3 — fixed in 1.1.3

How to fix

Upgrade to a fixed version: thinkjs think-helper 1.1.3. Check the vendor advisory for mitigations.

References

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