Fast-uri vulnerabilities
We track 11 vulnerabilities in Fast-uri products. 11 are rated high or critical, and none are known to be exploited. The most recent was published on September 3, 2026.
Latest Fast-uri vulnerabilities
- 7.5 High severity
fast-uri: Interpretation Conflict
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 domai
- 7.5 High severity
fast-uri: Improper Encoding or Escaping of Output
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 is concatenated verbatim, so a port value that is not a sequence of digits can inject authority del
- 7.5 High severity
fast-uri: Improper Handling of URL Encoding (Hex Encoding)
fast-uri is a URI parser for Node.js. During parsing it runs a legacy decoding pass over the scheme component and never re-escapes the result, and serialization writes the scheme back out verbatim, unlike the host component which is re-escaped. As a result an
- 7.5 High severity
fast-uri is a URI parser for Node.js. Its custom parser for bracketed IPv6 literals does not…
fast-uri is a URI parser for Node.js. Its custom parser for bracketed IPv6 literals does not validate the complete IPv6 grammar, so invalid trailing text in an authority can be silently discarded and a malformed attacker-controlled host is turned into a differ
- 7.5 High severity
fast-uri: Interpretation Conflict
fast-uri is a URI parser for Node.js. It canonicalizes a host to its ASCII form only when the input carries an explicit scheme, so a scheme-relative reference such as a host preceded by two slashes is returned with its host verbatim and no error set. As a resu
- 7.5 High severity
fast-uri: Double Decoding of the Same Data
fast-uri is a URI parser for Node.js. It decodes percent escapes in a hostname during parsing and then decodes the parsed hostname a second time during authority recomposition, so a single call to normalize or resolve can turn nested percent-encoded input into
- 7.5 High severity
fast-uri: Interpretation Conflict
fast-uri before 4.1.2, 3.1.5, and 2.4.4 requires a literal double forward slash to recognize a URI authority, so a reference that uses a backslash based introducer in place of it (backslash backslash, forward slash backslash, or backslash forward slash) is par
- 7.5 High severity
fast-uri: Interpretation Conflict
Impact: fast-uri versions from 2.3.1 through 4.1.0 (including the 3.x line up to 3.1.3 and the 2.x line up to 2.4.2) do not treat a literal backslash character (U+005C) as an authority delimiter. Node's native WHATWG URL parser, used by fetch, undici, and Node
- 7.5 High severity
fast-uri: Interpretation Conflict
fast-uri versions 2.3.1 through 3.1.2 and 4.0.0 fail to canonicalize Unicode (IDN) hostnames for HTTP-family URLs. The IDN conversion path calls a helper that does not exist on the global URL constructor, silently leaving the host in its original Unicode form
- 7.5 High severity
fast-uri: Interpretation Conflict
fast-uri normalize() decoded percent-encoded authority delimiters inside the host component and then re-emitted them as raw delimiters during serialization. A host that combined an allowed domain, an encoded at-sign, and a different domain was re-emitted with
- 7.5 High severity
fast-uri: Improper Limitation of a Pathname to a Restricted Directory
fast-uri decoded percent-encoded path separators and dot segments before applying dot-segment removal in its normalize() and equal() functions. Encoded path data was treated like real slashes and parent-directory references, so distinct URIs could collapse ont