CVE-2020-26291
Depending on library usage and attacker intent, impacts may include allow/block list bypasses, SSRF attacks, open redirects, or other undesired behavior.
Does this matter?
Lower severity and a low EPSS score (1.69%). Track it; it rarely justifies an emergency change on its own.
Description
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.]
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 1.69% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- uri.js project/uri.js
- Source
- security-advisories@github.com
References
- https://github.com/medialize/URI.js/commit/b02bf037c99ac9316b77ff8bfd840e90becf1155Patch, Third Party Advisory
- https://github.com/medialize/URI.js/releases/tag/v1.19.4Release Notes, Third Party Advisory
- https://github.com/medialize/URI.js/security/advisories/GHSA-3329-pjwv-fjpgThird Party Advisory
- https://www.npmjs.com/package/urijsThird Party Advisory
- https://github.com/medialize/URI.js/commit/b02bf037c99ac9316b77ff8bfd840e90becf1155Patch, Third Party Advisory
- https://github.com/medialize/URI.js/releases/tag/v1.19.4Release Notes, Third Party Advisory
- https://github.com/medialize/URI.js/security/advisories/GHSA-3329-pjwv-fjpgThird Party Advisory
- https://www.npmjs.com/package/urijsThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.