chore(deps): bump undici and @actions/http-client

[dependabot]

Bumps undici to 6.28.0 and updates ancestor dependency @actions/http-client. These dependencies need to be updated together.

Updates undici from 5.29.0 to 6.28.0

Release notes

Sourced from undici's releases.

v6.28.0

Full Changelog: nodejs/undici@v6.27.0...v6.28.0

v6.27.0

⚠️ Security Release

This release line addresses 4 security advisories.

Action required: Upgrade to undici 6.27.0 or later.

npm install undici@^6.27.0

Note on patched version: the v6 fixes shipped in v6.27.0, not 6.26.0 — v6.26.0 contains only the chunked-EOF fix (#5308) and the version bump, none of the security fixes below.

The v6 line is not affected by the SOCKS5 advisories (GHSA-vmh5-mc38-953g, GHSA-hm92-r4w5-c3mj), the shared-cache disclosure (GHSA-pr7r-676h-xcf6), or the 8.x-only WebSocket regression (GHSA-38rv-x7px-6hhq).

Summary

Advisory	CVE	Severity (CVSS)	Fixed in	Fix commit
GHSA-vxpw-j846-p89q	CVE-2026-12151	High (7.5)	6.27.0	b7f252e7
GHSA-p88m-4jfj-68fv	CVE-2026-9679	Moderate (5.9)	6.27.0	25efa447
GHSA-g8m3-5g58-fq7m	CVE-2026-11525	Low (3.7)	6.27.0	25efa447
GHSA-35p6-xmwp-9g52	CVE-2026-6733	Low (3.7)	6.27.0	f4c31d60

---

High severity

WebSocket DoS via fragment count bypass — CVE-2026-12151

GHSA-vxpw-j846-p89q · CWE-400, CWE-770 Fix: b7f252e7 Backport WebSocket maxPayloadSize fixes (#5423, backported to v6 in #5428)

A malicious WebSocket server can stream a large number of small or empty continuation frames. Undici enforced a limit on cumulative payload size but did not limit the number of fragments per message, leading to unbounded memory growth and denial of service. All releases from 6.17.0 onward are affected.

• Affected: applications using new WebSocket(...) or WebSocketStream against untrusted endpoints.
• Workaround: none — upgrade is required.

---

... (truncated)

Commits

• 01a912e Bumped v6.28.0 (#5591)
• 481ecfc Use Node 22 and npm 11 to release
• 740a0b7 fix: validate blob body content type
• 2698e49 fix: validate coerced header values for CRLF (#5579)
• 4fd5a0c test(retry): correct broken content-range fixtures in retry-handler.js
• cba3a52 fix(retry): reject partial content length mismatch
• af74840 fix: harden cookie domain, path, and unparsed attribute validation
• 551138c Bumped v6.27.0 (#5431)
• b7f252e Backport WebSocket maxPayloadSize fixes to v7.x (#5423) (#5428)
• 25efa44 fix(cookies): preserve values and parse SameSite strictly
• Additional commits viewable in compare view

Maintainer changes

This version was pushed to npm by GitHub Actions, a new releaser for undici since your current version.

Install script changes

This version modifies prepare script that runs during installation. Review the package contents before updating.

Updates @actions/http-client from 2.2.3 to 4.0.1

Changelog

Sourced from @​actions/http-client's changelog.

4.0.1

• Bump undici from 6.23.0 to 6.24.0 #2347

4.0.0

• Breaking change: Package is now ESM-only
  • CommonJS consumers must use dynamic import() instead of require()

3.0.2

• Bump undici from 5.28.5 to 6.23.0

3.0.1

• Add support for ACTIONS_ORCHESTRATION_ID in user-agent and default user-agent #2229

3.0.0

• Add support for Node 24 #2110

Commits

• See full diff in compare view

Maintainer changes

This version was pushed to npm by GitHub Actions, a new releaser for @​actions/http-client since your current version.

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

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[roger-zhangg]

@dependabot ignore @actions/http-client major version

[dependabot]

This option is only available on single-dependency pull requests, as the versions in multi-dependency pull requests may differ.

If you'd like to ignore all updates for these dependencies just reply @dependabot ignore these dependencies.

[roger-zhangg]

@dependabot ignore this major version

[dependabot]

This option is only available on single-dependency pull requests, as the versions in multi-dependency pull requests may differ.

If you'd like to ignore all updates for these dependencies just reply @dependabot ignore these dependencies.

[roger-zhangg]

Closing: @actions/http-client v4 is published as ESM-only ("type": "module", exports exposes only an import condition). This action is entirely CommonJS — index.js, lib/setup.js and test/setup.test.js all use require()/module.exports, and the bundle is produced by ncc in CJS mode. That is why npm test fails with Cannot find module '@actions/http-client'.

Taking v4 requires a full ESM migration of the action (source, tests, jest config and the ncc build), which is far beyond the scope of a dependency bump. Staying on the 2.x line.

Note: @dependabot ignore ... major version is not available on multi-dependency PRs, so this is closed rather than ignored. A durable major-version ignore would need an ignore entry in .github/dependabot.yml.

@dependabot close

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.