{"id":"CVE-2020-26291","details":"URI.js is a javascript URL mutation library (npm package urijs). In URI.js before version 1.19.4, the hostname can be spoofed by using a backslash (`\\`) character followed by an at (`@`) character. If the hostname is used in security decisions, the decision may be incorrect. Depending on library usage and attacker intent, impacts may include allow/block list bypasses, SSRF attacks, open redirects, or other undesired behavior. For example the URL `https://expected-example.com\\@observed-example.com` will incorrectly return `observed-example.com` if using an affected version. Patched versions correctly return `expected-example.com`. Patched versions match the behavior of other parsers which implement the WHATWG URL specification, including web browsers and Node's built-in URL class. Version 1.19.4 is patched against all known payload variants. Version 1.19.3 has a partial patch but is still vulnerable to a payload variant.]","aliases":["GHSA-3329-pjwv-fjpg"],"modified":"2026-04-10T04:26:33.561300Z","published":"2020-12-31T00:15:12.327Z","related":["GHSA-3329-pjwv-fjpg"],"references":[{"type":"ADVISORY","url":"https://www.npmjs.com/package/urijs"},{"type":"ADVISORY","url":"https://github.com/medialize/URI.js/releases/tag/v1.19.4"},{"type":"ADVISORY","url":"https://github.com/medialize/URI.js/security/advisories/GHSA-3329-pjwv-fjpg"},{"type":"FIX","url":"https://github.com/medialize/URI.js/commit/b02bf037c99ac9316b77ff8bfd840e90becf1155"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/medialize/uri.js","events":[{"introduced":"0"},{"fixed":"bf04ec5f053829f9ea3a887608bdfca4fd84cd64"},{"fixed":"b02bf037c99ac9316b77ff8bfd840e90becf1155"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"1.19.4"}]}}],"versions":["v.1.15.1","v1.0.0","v1.1.0","v1.10.0","v1.10.1","v1.10.2","v1.12.0","v1.12.1","v1.13.0","v1.13.1","v1.13.2","v1.14.0","v1.15.0","v1.15.1","v1.15.2","v1.16.0","v1.17.0","v1.17.1","v1.18.0","v1.18.1","v1.18.10","v1.18.11","v1.18.12","v1.18.2","v1.18.3","v1.18.4","v1.18.5","v1.18.6","v1.18.7","v1.18.8","v1.18.9","v1.19.0","v1.19.1","v1.19.2","v1.19.3","v1.2.0","v1.3.0","v1.3.1","v1.4.0","v1.4.1","v1.4.2","v1.4.3","v1.5.0","v1.6.0","v1.6.1","v1.6.2","v1.6.3","v1.7.0","v1.7.1","v1.7.2","v1.7.3","v1.7.4","v1.8.0","v1.8.1","v1.8.2","v1.8.3","v1.9.0","v1.9.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-26291.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"}]}