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fix(deps): update dependency fast-uri@<=3.1.0 to >=3.1.5 [security] - #234

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fix(deps): update dependency fast-uri@<=3.1.0 to >=3.1.5 [security]#234
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renovate/npm-fast-uri-=3.1.0-vulnerability

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This PR contains the following updates:

Package Change Age Confidence
fast-uri@<=3.1.0 >=3.1.1 → >=3.1.5 age confidence

fast-uri vulnerable to host confusion via failed IDN canonicalization

CVE-2026-13676 / GHSA-4c8g-83qw-93j6

More information

Details

Impact

fast-uri versions >= 2.3.1, <= 4.0.0 fail to canonicalize Unicode/IDN hostnames for HTTP-family URLs. The IDN conversion path calls URL.domainToASCII(...) on the global WHATWG URL constructor, where that helper does not exist. The resulting TypeError is silently routed into parsed.error, but parse(), normalize(), and equal() all return with the host left in its original Unicode form.

For example, http://127。0。0。1/ is treated by fast-uri as host 127。0。0。1, while Node's WHATWG URL parser and fetch() canonicalize the same input to 127.0.0.1.

Applications that use fast-uri to enforce host-based policy (denylists, loopback filtering, redirect validation, outbound proxy routing) before passing the same URL into Node's URL or fetch() consumers see a policy/use desync and can be steered to an unintended destination.

Patches

Upgrade to fast-uri v4.0.1, v3.1.3, or v2.4.2

Workarounds

None. Upgrade to the patched version.

Severity

  • CVSS Score: 7.5 / 10 (High)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

fast-uri vulnerable to host confusion via literal backslash authority delimiter

CVE-2026-16221 / GHSA-v2hh-gcrm-f6hx

More information

Details

Impact

fast-uri v4.1.0 and earlier do not treat a literal backslash (U+005C) as an authority delimiter. Node's native WHATWG URL (used by fetch(), undici, and Node's http/https clients) normalizes \ to / for special schemes (http, https, ws, wss, ftp, file), so the two parsers extract different hosts from the same input string.

For example, http://evil.com\@allowed.com is treated by fast-uri as host allowed.com with userinfo evil.com\, while Node's WHATWG URL parser and fetch() see host evil.com with path /@allowed.com.

Applications that use fast-uri to enforce host-based policy (allowlists, denylists, loopback/SSRF filtering, redirect validation, outbound proxy routing) before passing the same URL into Node's URL or fetch() consumers see a policy/use desync and can be steered to an unintended destination, including cloud metadata endpoints, loopback, or internal hosts.

Patches

Upgrade to fast-uri v4.1.1, v3.1.4, or v2.4.3.

Workarounds

None. Upgrade to the patched version.

Severity

  • CVSS Score: 7.5 / 10 (High)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

fast-uri vulnerable to host confusion via backslash authority introducer

CVE-2026-18446 / GHSA-7p8r-x3mc-p8w7

More information

Details

Impact

fast-uri v4.1.1 and earlier require a literal // to recognize a URI authority, so a reference that uses \\, /\, or \/ as the authority introducer (in place of //, after an optional scheme) is parsed with no authority: the sequence and everything after it fold into the path. Node's native WHATWG URL (used by fetch(), undici, and Node's http/https clients) instead treats \ as interchangeable with / for special schemes (http, https, ws, wss, ftp, file), so the two parsers extract different hosts from the same input.

For example, fast-uri resolves \\evil.com/path against base https://allowed.com/ to https://allowed.com/%5C%5Cevil.com/path (confined to the trusted host), while Node's WHATWG URL resolves the same reference to https://evil.com/path.

Applications that use fast-uri to enforce host-based policy (allowlists, denylists, loopback/SSRF filtering, redirect validation, outbound proxy routing) before passing the same URL into Node's URL or fetch() consumers see a policy/use desync and can be steered to an unintended destination.

Patches

Upgrade to fast-uri v4.1.2, v3.1.5, v2.4.4.

Workarounds

None. Upgrade to the patched version.

Severity

  • CVSS Score: 7.5 / 10 (High)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

⚠️ Renovate does not enforce Minimum Release Age for bump, lockfileUpdate, or rollback updates, so these are raised without a Minimum Release Age check. You will need to manually validate the Minimum Release Age for these package(s).

Release Notes

fastify/fast-uri (fast-uri@<=3.1.0)

v3.1.5

Compare Source

⚠️ Security Warning

Fix for GHSA-7p8r-x3mc-p8w7

Full Changelog: fastify/fast-uri@v3.1.4...v3.1.5

v3.1.4

Compare Source

⚠️ Security Release

Fix for GHSA-v2hh-gcrm-f6hx

Full Changelog: fastify/fast-uri@v3.1.3...v3.1.4

v3.1.3

Compare Source

⚠️ Security Release

Full Changelog: fastify/fast-uri@v3.1.2...v3.1.3

v3.1.2

Compare Source

⚠️ Security Release

What's Changed

Full Changelog: fastify/fast-uri@v3.1.1...v3.1.2

Configuration

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🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

  • If you want to rebase/retry this PR, check this box

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@renovate
renovate Bot requested a review from prisis as a code owner July 25, 2026 13:25
@renovate renovate Bot added the security label Jul 25, 2026
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github-actions Bot commented Jul 25, 2026

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Thank you for following the naming conventions! 🙏

@renovate
renovate Bot force-pushed the renovate/npm-fast-uri-=3.1.0-vulnerability branch from 9ca0c9a to 68aa91a Compare July 25, 2026 21:42
@renovate renovate Bot changed the title fix(deps): update dependency fast-uri@<=3.1.0 to >=3.1.3 [security] fix(deps): update dependency fast-uri@<=3.1.0 to >=3.1.4 [security] Jul 25, 2026
@renovate
renovate Bot force-pushed the renovate/npm-fast-uri-=3.1.0-vulnerability branch 2 times, most recently from 1921876 to 4d7cb15 Compare August 5, 2026 17:30
@renovate renovate Bot changed the title fix(deps): update dependency fast-uri@<=3.1.0 to >=3.1.4 [security] fix(deps): update dependency fast-uri@<=3.1.0 to >=3.1.5 [security] Aug 5, 2026
@renovate
fix(deps): update dependency fast-uri@<=3.1.0 to >=3.1.5 [security]
e753f7d 
Signed-off-by: Renovate Bot <bot@renovateapp.com>
@renovate
renovate Bot force-pushed the renovate/npm-fast-uri-=3.1.0-vulnerability branch from 4d7cb15 to e753f7d Compare August 8, 2026 09:09
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