CVE-2026-45822CWE-400CWE-407

decode-uri-component through 0.4.1 is vulnerable to denial of service

Medium · published June 30, 2026

CVSS v4.0
6.6
EPSS
1%
Percentile
42.3
In the wild
Unconfirmed
What it is

decode-uri-component through 0.4.1 is vulnerable to denial of service. The decode() function splits input on '%' producing N tokens and calls decodeComponents(), exhibiting super-linear parsing time: 200 '%ab' tokens takes approximately 0.7s, 700 tokens approximately 6s, and 1400 tokens approximately 33s. An attacker can cause significant CPU consumption and event-loop blocking via crafted input.

The record
Technical detail
CVSS v4.0
6.6 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:Y/R:U/V:D/RE:M/U:Amber
EPSS
0.00507 · 42.3th percentile
Weaknesses
CWE-400 · Uncontrolled Resource Consumption; CWE-407 · Inefficient Algorithmic Complexity
Published
2026-06-30T08:05Z
EPSS history
Timeline
  • 30 JUN 08:05Z
    decode-uri-component through 0.4.1 is vulnerable to denial of service
    cvelistv5