fast-uri: fast-uri: Host confusion via skipped IDN canonicalization

A flaw was found in fast-uri, a URI parser for Node.js. This vulnerability arises because the parser fails to consistently convert internationalized domain names IDN to their standard ASCII form when processing scheme-relative references. This inconsistency can lead to host confusion, where an...

fast-uri: fast-uri: Host confusion via unbalanced URI brackets can bypass security policies

A flaw was found in fast-uri. The library incorrectly processes Uniform Resource Identifier URI hosts containing unbalanced brackets, leading to a discrepancy in how the host is parsed by fast-uri compared to other HTTP clients. This host confusion can allow an attacker to bypass security policie...

EUVD-2026-70280

fast-uri vulnerable to authority injection via an unvalidated port in serialize...

fast-uri vulnerable to host confusion via an unclosed bracket in the URI authority

Impact fast-uri accepts a host that contains an unbalanced or misplaced authority bracket or without reporting an error. A host that starts with but does not end with , such as @127.0.0.1, is neither validated as an IP literal nor canonicalized as a domain name, so parse returns it as the host wi...

NPM: fast-uri vulnerable to host confusion via an unclosed bracket in the URI authority

NPM: fast-uri vulnerable to host confusion via an unclosed bracket in the URI authority vulnerability discovered by ? in WordPress Npm fast-uri versions 2.4.5...

GHSA-58MR-GQGX-XQ4G fast-uri vulnerable to host confusion via an unclosed bracket in the URI authority

Impact fast-uri accepts a host that contains an unbalanced or misplaced authority bracket or without reporting an error. A host that starts with but does not end with , such as @127.0.0.1, is neither validated as an IP literal nor canonicalized as a domain name, so parse returns it as the host wi...

Important: Red Hat Security Advisory: OpenShift Container Platform 4.20.39 security and extras update

Red Hat OpenShift Container Platform release 4.20.39 is now available with updates to packages and images that fix several bugs. This release includes a security update for Red Hat OpenShift Container Platform 4.20. Red Hat Product Security has rated this update as having a security impact of...

fast-uri: fast-uri: Host confusion via unbalanced URI brackets can bypass security policies

A flaw was found in fast-uri. The library incorrectly processes Uniform Resource Identifier URI hosts containing unbalanced brackets, leading to a discrepancy in how the host is parsed by fast-uri compared to other HTTP clients. This host confusion can allow an attacker to bypass security policie...

fast-uri: fast-uri: Host confusion via unbalanced URI brackets can bypass security policies

A flaw was found in fast-uri. The library incorrectly processes Uniform Resource Identifier URI hosts containing unbalanced brackets, leading to a discrepancy in how the host is parsed by fast-uri compared to other HTTP clients. This host confusion can allow an attacker to bypass security policie...

OESA-2026-3591 perl-URI security update

This module implements the URI class. Objects of this class represent "Uniform Resource Identifier references" as specified in RFC 2396 and updated by RFC 2732. Security Fixes: URI versions before 5.36 for Perl encode non-NFC host names to non-standard punycode labels via missing normalization in...

fast-uri: fast-uri: Host confusion via unbalanced URI brackets can bypass security policies

A flaw was found in fast-uri. The library incorrectly processes Uniform Resource Identifier URI hosts containing unbalanced brackets, leading to a discrepancy in how the host is parsed by fast-uri compared to other HTTP clients. This host confusion can allow an attacker to bypass security policie...

Linux Distros Unpatched Vulnerability : CVE-2026-84292

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - fast-uri serializes the port component of a URI without validating it. When recomposing the authority, the userinfo and host components are escaped but the port...

Host Confusion

Overview fast-uri is a Dependency-free RFC 3986 URI toolbox Affected versions of this package are vulnerable to Host Confusion in the parse function, which returns a host that begins with but has no closing , such as @127.0.0.1, without validating it as an IPv6 literal or canonicalizing it as a...

CVE-2026-84394 fast-uri vulnerable to host confusion via an unclosed bracket in the URI authority

fast-uri accepts a host that contains an unbalanced or misplaced authority bracket without reporting an error. A host that starts with an opening bracket but does not end with a closing bracket is neither validated as an IP literal nor canonicalized as a domain name, so parse returns it as the ho...

CVE-2026-84394 fast-uri vulnerable to host confusion via an unclosed bracket in the URI authority

fast-uri accepts a host that contains an unbalanced or misplaced authority bracket without reporting an error. A host that starts with an opening bracket but does not end with a closing bracket is neither validated as an IP literal nor canonicalized as a domain name, so parse returns it as the ho...

CVE-2026-84394 fast-uri vulnerable to host confusion via an unclosed bracket in the URI authority

fast-uri accepts a host that contains an unbalanced or misplaced authority bracket without reporting an error. A host that starts with an opening bracket but does not end with a closing bracket is neither validated as an IP literal nor canonicalized as a domain name, so parse returns it as the ho...

CVE-2026-84394

fast-uri (a URI parsing library used by the Fastify ecosystem) contains a host confusion vulnerability: when a URI's authority contains an opening bracket [ without a matching closing bracket ], parse() returns the string as the host without error. Neither an IP literal nor a valid domain name is...

GHSA-5JGF-P345-68V8 fast-uri vulnerable to host confusion via skipped IDN canonicalization on scheme-relative references

Impact fast-uri canonicalizes a host to its ASCII form only when the input carries an explicit scheme. When resolve resolves a scheme-relative reference //host/ against a scheme-bearing base, it still emits the host verbatim even though the effective scheme is known, so re-parsing the resolved UR...

EUVD-2026-64758

fast-uri vulnerable to host confusion via skipped IDN canonicalization on scheme-relative references...

fast-uri vulnerable to host confusion via skipped IDN canonicalization on scheme-relative references

Impact fast-uri canonicalizes a host to its ASCII form only when the input carries an explicit scheme. When resolve resolves a scheme-relative reference //host/ against a scheme-bearing base, it still emits the host verbatim even though the effective scheme is known, so re-parsing the resolved UR...