CVE-2020-28499

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 merge 2.1.1.

All versions of package merge are vulnerable to Prototype Pollution via _recursiveMerge .

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)
Published: 2021-02-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-7wpw-2hjm-89gp	npm	merge	<2.1.1	2.1.1