Bump engine.io from 6.6.4 to 6.6.9

[dependabot]

Bumps engine.io from 6.6.4 to 6.6.9.

Release notes

Sourced from engine.io's releases.

engine.io@6.6.9

The ws dependency was bumped to ~8.21.0 following CVE-2026-48779.

Dependencies

• ws@~8.21.0 (diff)

engine.io-client@6.6.5

The ws dependency was bumped to ~8.20.1 following CVE-2026-45736.

Note from the ws maintainers:

Although the calculated CVSS severity is medium, the actual severity is believed to be low, as the flaw is only exploitable through misuse that is unlikely in practice.

Dependencies

• ws@~8.20.1 (diff)

engine.io@6.6.8

The ws dependency was bumped to ~8.20.1 following CVE-2026-45736.

Note from the ws maintainers:

Although the calculated CVSS severity is medium, the actual severity is believed to be low, as the flaw is only exploitable through misuse that is unlikely in practice.

Bug Fixes

• clean up resources upon WebTransport handshake failure (f86b95f)

Dependencies

• ws@~8.20.1 (diff)

engine.io@6.6.7

Bug Fixes

• close HTTP requests with invalid content type (fc11285)
• handle invalid packets when upgrading to WebTransport (1fa1f46)
• prevent WebTransport connections when a middleware is registered (d1f5aa9)

Dependencies

• ws@~8.18.3 (no change)

engine.io@6.6.6

... (truncated)

Commits

• 9dbec81 chore(release): engine.io@6.6.9
• 3ad4e1f docs: improve example with PM2
• 0e5afee docs: add example with PM2
• eab9623 docs(eio): correct maxHttpBufferSize default in JSDoc (#5508)
• c17890c docs: add documentation about WebTransport
• 20df6ae docs(examples): add client-side load balancing example
• 16d1923 ci(publish): enable staged publishing
• ad48a9b docs(examples): add example with HTTP/2
• 190572d refactor(eio-client): remove XMLHttpRequest from the definition file
• fad463c docs(examples): fix duplicate self messages (#5341)
• Additional commits viewable in compare view

Maintainer changes

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

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[github-actions]

Dependency Bump Evaluation

Version change: engine.io 6.6.4 -> 6.6.9 (patch)
Semver bump type: patch (5 patch versions)

Changes:

• Bumps transitive ws dependency to ~8.21.0 fixing CVE-2026-48779 and CVE-2026-45736
• Bug fixes for WebTransport handshake failures and invalid packet handling
• Closes HTTP requests with invalid content type

Breaking changes: None

Security concerns: None — this bump fixes two CVEs in the ws WebSocket library. The npm releaser changed to GitHub Actions (standard CI/CD publishing), no supply chain concern.

Impact on codebase: engine.io is a transitive dependency (via socket.io ^4.8.0). No direct usage of engine.io APIs or WebTransport found in the codebase. Only yarn.lock is modified — no source code changes required.

Recommendation: SAFE TO MERGE

Notes: CI checks (test, prettier, CodeQL) were still in progress at time of review. Merge after CI passes. This is a security-driven update and should be merged promptly.

— Claude Code