What’s Vulnerable › Vulnerabilities

CVE-2021-3645: Prototype Pollution in viking04/merge

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-09-10 · updated 2026-06-17
Weakness: CWE-1321

Description

merge is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Affected products

@ianwalter/merge: before 1.0.2 — fixed in 1.0.2

How to fix

Upgrade to a fixed version: @ianwalter/merge 1.0.2. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2021-3645 or the next vulnerability affects your stack