CVE-2026-118664 decode-uri-component - Denial of Service

decode-uri-component < 0.5.1 contains a denial of service caused by quadratic CPU consumption in customDecodeURIComponent fallback on malformed input, letting attackers block the Node.js event loop, exploit requires crafted large input.

CVSS base score 8.2 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
28 October 2026
Updated
29 October 2026
Weakness
CWE-400

Vendor fix

Update to version 0.5.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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