CVE-2026-26021 — Prototype pollution in set-in
set-in provides the set value of nested associative structure given array of keys. A prototype pollution vulnerability exists in the the npm package set-in (>=2.0.1, < 2.0.5). D…
Published: 2026-02-11 · CVSS: 9.4 · CVSS 4.0
set-in provides the set value of nested associative structure given array of keys. A prototype pollution vulnerability exists in the the npm package set-in (>=2.0.1, < 2.0.5). Despite a previous fix that attempted to mitigate prototype pollution by checking whether user input contained a forbidden key, it is still possible to pollute Object.prototype via a crafted input using Array.prototype. This has been fixed in version 2.0.5.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7