PT-2026-53825 · Samverschueren · Decode-Uri-Component

Seal Security · Published 2026-06-30 · Updated 2026-06-30 · CVE-2026-45822

NVD

CVSS v4.0

6.6

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/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:N/AU:Y/R:U/V:D/RE:M/U:Amber

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.

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

CWE-407

Related Identifiers

CVE-2026-45822

Affected Products

Decode-Uri-Component

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-45822 · Security Note
• https://github.com/SamVerschueren/decode-uri-component/blob/00662938dc7c6241547ae8abce7785cc13ffd3f6/index.js · Note
• https://github.com/SamVerschueren/decode-uri-component/commit/fa479dafeede7bedf04e5c89aa78f2a78c664005 · Note
• https://npmjs.com/package/decode-uri-component · Note