CVE-2021-3645

9.8 criticalEPSS 1.4%

Critical (9.8) in merge project merge. EPSS 1.4% chance of exploitation in the next 30 days. Fixed in @viking04/merge 1.0.2.

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

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.4% chance of exploitation in the next 30 days; higher than 73% of CVEs (scores of 2026-10-31)
CWE: CWE-1321
Published: 2021-09-10
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-cqqh-49mx-fq63	npm	@viking04/merge	<1.0.2	1.0.2