CVE-2026-45822

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.

Score

CVSS 4.0 6.6 Medium

Status

Deferred - 22e2d327-25fe-45d7-9f0c-dcd23b7108df

Published

2026-06-30

Last modified

2026-10-25

Weaknesses

CWE-400, CWE-407

Affected products

• Decode-uri-component (Samverschueren)

References

• https://github.com/SamVerschueren/decode-uri-component/blob/00662938dc7c6241547ae8abce7785cc13ffd3f6/index.js
• https://github.com/SamVerschueren/decode-uri-component/commit/fa479dafeede7bedf04e5c89aa78f2a78c664005
• https://www.npmjs.com/package/decode-uri-component