Sourced from engine.io's releases.

3.6.1

⚠️ This release contains an important security fix ⚠️

A malicious client could send a specially crafted HTTP request, triggering an uncaught exception and killing the Node.js process:

Error: read ECONNRESET
    at TCP.onStreamRead (internal/stream_base_commons.js:209:20)
Emitted 'error' event on Socket instance at:
    at emitErrorNT (internal/streams/destroy.js:106:8)
    at emitErrorCloseNT (internal/streams/destroy.js:74:3)
    at processTicksAndRejections (internal/process/task_queues.js:80:21) {
  errno: -104,
  code: 'ECONNRESET',
  syscall: 'read'
}

Please upgrade as soon as possible.

Bug Fixes

• catch errors when destroying invalid upgrades (83c4071)

3.6.0

Bug Fixes

• add extension in the package.json main entry (#608) (3ad0567)
• do not reset the ping timer after upgrade (1f5d469)

Features

• decrease the default value of maxHttpBufferSize (58e274c)

This change reduces the default value from 100 mb to a more sane 1 mb.

This helps protect the server against denial of service attacks by malicious clients sending huge amounts of data.

See also: GHSA-j4f2-536g-r55m

• increase the default value of pingTimeout (f55a79a)

Links

• Diff: socketio/engine.io@3.5.0...3.6.0
• Client release: -

... (truncated)

Sourced from engine.io's changelog.

3.6.1 (2022-11-20)

⚠️ This release contains an important security fix ⚠️

A malicious client could send a specially crafted HTTP request, triggering an uncaught exception and killing the Node.js process:

Error: read ECONNRESET
    at TCP.onStreamRead (internal/stream_base_commons.js:209:20)
Emitted 'error' event on Socket instance at:
    at emitErrorNT (internal/streams/destroy.js:106:8)
    at emitErrorCloseNT (internal/streams/destroy.js:74:3)
    at processTicksAndRejections (internal/process/task_queues.js:80:21) {
  errno: -104,
  code: 'ECONNRESET',
  syscall: 'read'
}

Please upgrade as soon as possible.

Bug Fixes

• catch errors when destroying invalid upgrades (83c4071)

6.2.1 (2022-11-20)

⚠️ This release contains an important security fix ⚠️

A malicious client could send a specially crafted HTTP request, triggering an uncaught exception and killing the Node.js process:

Error: read ECONNRESET
    at TCP.onStreamRead (internal/stream_base_commons.js:209:20)
Emitted 'error' event on Socket instance at:
    at emitErrorNT (internal/streams/destroy.js:106:8)
    at emitErrorCloseNT (internal/streams/destroy.js:74:3)
    at processTicksAndRejections (internal/process/task_queues.js:80:21) {
  errno: -104,
  code: 'ECONNRESET',
  syscall: 'read'
}

Please upgrade as soon as possible.

Bug Fixes

... (truncated)

• 67a3a87 chore(release): 3.6.1
• 83c4071 fix: catch errors when destroying invalid upgrades
• f62f265 chore(release): 3.6.0
• f55a79a feat: increase the default value of pingTimeout
• 1f5d469 fix: do not reset the ping timer after upgrade
• 3ad0567 fix: add extension in the package.json main entry (#608)
• 58e274c feat: decrease the default value of maxHttpBufferSize
• b9dee7b chore(release): 3.5.0
• 19cc582 feat: add support for all cookie options
• 5ad2736 feat: disable perMessageDeflate by default
• Additional commits viewable in compare view

Sourced from socket.io's releases.

2.5.0

⚠️ WARNING ⚠️

The default value of the maxHttpBufferSize option has been decreased from 100 MB to 1 MB, in order to prevent attacks by denial of service.

Security advisory: GHSA-j4f2-536g-r55m

Bug Fixes

• fix race condition in dynamic namespaces (05e1278)
• ignore packet received after disconnection (22d4bdf)
• only set 'connected' to true after middleware execution (226cc16)
• prevent the socket from joining a room after disconnection (f223178)

Links:

• Diff: socketio/socket.io@2.4.1...2.5.0
• Client release: 2.5.0
• engine.io version: ~3.6.0 (diff)
• ws version: ~7.4.2

2.4.1

This release reverts the breaking change introduced in 2.4.0 (socketio/socket.io@f78a575).

If you are using Socket.IO v2, you should explicitly allow/disallow cross-origin requests:

• without CORS (server and client are served from the same domain):

const io = require("socket.io")(httpServer, {
  allowRequest: (req, callback) => {
    callback(null, req.headers.origin === undefined); // cross-origin requests will not be allowed
  }
});

• with CORS (server and client are served from distinct domains):

io.origins(["http://localhost:3000"]); // for local development
io.origins(["https://example.com"]);

In any case, please consider upgrading to Socket.IO v3, where this security issue is now fixed (CORS is disabled by default).

Reverts

• fix(security): do not allow all origins by default (a169050)

Links:

... (truncated)

Sourced from socket.io's changelog.

2.5.0 (2022-06-26)

Bug Fixes

• fix race condition in dynamic namespaces (05e1278)
• ignore packet received after disconnection (22d4bdf)
• only set 'connected' to true after middleware execution (226cc16)
• prevent the socket from joining a room after disconnection (f223178)

4.5.1 (2022-05-17)

Bug Fixes

• forward the local flag to the adapter when using fetchSockets() (30430f0)
• typings: add HTTPS server to accepted types (#4351) (9b43c91)

4.5.0 (2022-04-23)

Bug Fixes

• typings: ensure compatibility with TypeScript 3.x (#4259) (02c87a8)

Features

• add support for catch-all listeners for outgoing packets (531104d)

This is similar to onAny(), but for outgoing packets.

Syntax:

socket.onAnyOutgoing((event, ...args) => {
  console.log(event);
});

• broadcast and expect multiple acks (8b20457)

Syntax:

io.timeout(1000).emit("some-event", (err, responses) => {
</tr></table> 

... (truncated)

• baa6804 chore(release): 2.5.0
• f223178 fix: prevent the socket from joining a room after disconnection
• 226cc16 fix: only set 'connected' to true after middleware execution
• 05e1278 fix: fix race condition in dynamic namespaces
• 22d4bdf fix: ignore packet received after disconnection
• dfded53 chore: update engine.io version to 3.6.0
• e6b8697 chore(release): 2.4.1
• a169050 revert: fix(security): do not allow all origins by default
• 873fdc5 chore(release): 2.4.0
• f78a575 fix(security): do not allow all origins by default
• Additional commits viewable in compare view

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