{"cve":"CVE-2026-45822","nvd":{"published":"2026-06-30T09:16:25.177","modified":"2026-10-25T21:10:00.770","status":"Deferred","description":"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.","cvss_v4":{"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","score":6.6},"cvss_v3":null,"cwes":["CWE-400","CWE-407"],"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"],"products":[],"source":"nvd","synced_at":"2026-10-25T23:44:33.281319194+00:00"},"epss":{"cve":"CVE-2026-45822","score":0.00507,"percentile":0.42953,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-vcc3-ghjq-m6fr","url":"https://osv.dev/vulnerability/GHSA-vcc3-ghjq-m6fr","summary":"decode-uri-component: Denial of service via exponential decoding of malformed percent-encoded input","modified":"2026-09-10T03:51:14.713899943Z","packages":[{"ecosystem":"npm","name":"decode-uri-component","purl":"pkg:npm/decode-uri-component","ranges":["<0.5.0"],"fixed":["0.5.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}