CVE-2026-119051
HIGH5.9CVSS v3
—CVSS v2
—
EPSS (exploit probability)
CWE-770CWE
Description
flat through 6.0.1 contains an uncontrolled resource allocation vulnerability in unflatten() that allows attackers to create huge sparse arrays via unbounded numeric keys. Attackers can supply flattened keys such as a.4294967294, causing iteration with forEach, spread or JSON.stringify to block the Node.js event loop.
CVSS v3 vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected routers (0)
No routers currently mapped to this CVE in our database.