[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
path-to-regexp@>=6.0.0 <6.3.0	[6.3.0 → 9.0.0](https://renovatebot.com/diffs/npm/path-to-regexp@>=6.0.0 <6.3.0/6.3.0/9.0.0)

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Release Notes

pillarjs/path-to-regexp (path-to-regexp@>=6.0.0 <6.3.0)

v9.0.0

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Important: This release switches the package to ESM only and node >= 22. The primary incompatible API change is to switch ambiguous matches (2+ parameters in a segment) from the first being greedy to the last. For example:

const input = "/foo.json.html";
const fn = match("/:file.:ext");

fn(input); //=> ["foo", "json.html"]

In the v8 this would have output ["foo.json", "html"]. Making the last parameter and wildcard greedy can improve performance of the regular expressions and makes it easier to build non-regex based versions of the matcher.

Changed

• Avoid duplicate trailing delimiter matches by @​vibhor-aggr in #​443
  • A path that explicitly provided the trailing delimiter (e.g. /foo/) will no longer append an extra optional delimiter
• Refactor matching to be non-greedy by @​blakeembrey in #​450
• Build project as ESM by @​blakeembrey in #​458
• Remove TokenData class and Keys type by @​blakeembrey in #​461

Fixed

• Reject an empty-string param in compile by @​spokodev in #​444
• Reject wildcard array that compiles to an empty path by @​spokodev in #​448
• Fix stringify of param names with control characters by @​chatman-media in #​445
• Quote param names followed by astral ID_Continue text by @​dylanpulver in #​451
• Fix stringify lookahead across empty text tokens by @​jakezwang in #​456

Full Changelog: pillarjs/path-to-regexp@v8.4.2...v9.0.0

v8.4.2

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Fixed

• Error on trailing backslash (#​434) 9a78879

Performance

• Minimize array allocations (#​437) 937c02d
• Improve compile performance (#​436) 57247e6
  • Should improve compilation performance by ~25%
• Remove internal tokenization during parse (#​435) 5844988
  • Should improve parse performance by ~20%

Bundle size to 1.93 kB, from 1.97 kB.

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v8.4.1

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Fixed

• Remove trie deduplication (#​431) 6bc8e84
  • Using a trie required non-greedy matching, which regressed wildcards in non-ending mode by matching them up until the first match. For example:
    • /*foo with /a/b = /a
    • /*foo.htmlwith /a/b.html/c.html = /a/b.html
• Allow backtrack handling to match itself (#​427) 5bcd30b
  • When backtracking was introduced, it rejected matching things like /:"a"_:"b" against /foo__. This makes intuitive sense because the second parameter is not going to backtrack on _ anymore, but it's somewhat unexpected since there's no reason it shouldn't match the second _.

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v8.4.0

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Important

• Fix CVE-2026-4926 (GHSA-j3q9-mxjg-w52f)
• Fix CVE-2026-4923 (GHSA-27v5-c462-wpq7)

Fixed

• Restricts wildcard backtracking when using more than 1 in a path (#​421)

Changed

• Dedupes regex prefixes (#​422)
  • This will result in shorter regular expressions for some cases using optional groups
• Rejects large optional route combinations (#​424)
  • When using groups such as /users{/delete} it will restrict the number of generated combinations to < 256, equivalent to 8 top-level optional groups and unlikely to occur in a real world application, but avoids exploding the regex size for applications that accept user created routes

v8.3.0

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Changed

• Add custom error class (#​398) 2a7f2a4
• Allow plain objects for TokenData (#​391) 687a9bb
• Escape text should escape backslash (#​390) a4a8552
• Improved error messages and stack size (#​363) a6bdf40

Other

• Minifying the parser
  • PR (#​401) 9df2448
  • PR (#​395) 4a91505
  • Shaving some bytes d63f44b
  • Remove optional operator 973d15c

v8.2.0

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Fixed

• Allowing path-to-regexp to run on older browsers by targeting ES2015
  • Target ES2015 5969033
    • Also saved 0.22kb (10%!) by removing the private class field down level
  • Remove s flag from regexp 51dbd45

v8.1.0

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Added

• Adds pathToRegexp method back for generating a regex
• Adds stringify method for converting TokenData into a path string

v8.0.0: Simpler API

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Heads up! This is a fairly large change (again) and I need to apologize in advance. If I foresaw what this version would have ended up being I would not have released version 7. A longer blog post and explanation will be incoming this week, but the pivot has been due to work on Express.js v5 and this will the finalized syntax used in Express moving forward.

Edit: The post is out - https://blakeembrey.com/posts/2024-09-web-redos/

Added

• Adds key names to wildcards using *name syntax, aligns with : behavior but using an asterisk instead

Changed

• Removes group suffixes of ?, +, and * - only optional exists moving forward (use wildcards for +, {*foo} for *)
• Parameter names follow JS identifier rules and allow unicode characters

Added

• Parameter names can now be quoted, e.g. :"foo-bar"
• Match accepts an array of values, so the signature is now string | TokenData | Array<string | TokenData>

Removed

• Removes loose mode
• Removes regular expression overrides of parameters

v7.2.0: Support array inputs (again)

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Added

• Support array inputs for match and pathToRegexp 3fdd88f

v7.1.0: Strict mode

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Added

• Adds a strict option to detect potential ReDOS issues

Fixed

• Fixes separator to default to suffix + prefix when not specified
• Allows separator to be undefined in TokenData
  • This is only relevant if you are building TokenData manually, previously parse filled it in automatically

Comments

• I highly recommend enabling strict: true and I'm probably releasing a V8 with it enabled by default ASAP as a necessary security mitigation

v7.0.0: Wildcard, unicode, and modifier changes

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Hi all! There's a few major breaking changes in this release so read carefully.

Breaking changes:

• The function returned by compile only accepts strings as values (i.e. no numbers, use String(value) before compiling a path)
  • For repeated values, when encode !== false, it must be an array of strings
• Parameter names can contain all unicode identifier characters (defined as regex \p{XID_Continue}).
• Modifiers (?, *, +) must be used after a param explicitly wrapped in {}
  • No more implied prefix of / or .
• No support for arrays or regexes as inputs
• The wildcard (standalone *) has been added back and matches Express.js expected behavior
• Removed endsWith option
• Renamed strict: true to trailing: false
• Reserved ;, ,, !, and @ for future use-cases
• Removed tokensToRegexp, tokensToFunction and regexpToFunction in favor of simplifying exports
• Enable a "loose" mode by default, so / can be repeated multiple times in a matched path (i.e. /foo works like //foo, etc)
• encode and decode no longer receive the token as the second parameter
• Removed the ESM + CommonJS dual package in favor of only one CommonJS supported export
• Minimum JS support for ES2020 (previous ES2015)
• Encode defaults to encodeURIComponent and decode defaults to decodeURIComponent

Added:

• Adds encodePath to fix an issue around encode being used for both path and parameters (the path and parameter should be encoded slightly differently)
• Adds loose as an option to support arbitrarily matching the delimiter in paths, e.g. foo/bar and foo///bar should work the same
• Allow encode and decode to be set to false which skips all processing of the parameters input/output
• All remaining methods support TokenData (exported, returned by parse) as input
  • This should be useful if you are programmatically building paths to match or want to avoid parsing multiple times

Requests for feedback:

• Requiring {} is an obvious drawback but I'm seeking feedback on whether it helps make path behavior clearer
  • Related: Removing / and . as implicit prefixes
• Removing array and regex support is to reduce the overall package size for things many users don't need
• Unicode IDs are added to align more closely with browser URLPattern behavior, which uses JS identifiers

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