Sourced fromsocket.io's releases.

2.4.1

This release reverts the breaking change introduced in2.4.0 (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):

io.origins((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 developmentio.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:

• Diff:socketio/socket.io@2.4.0...2.4.1
• Client release: -
• engine.io version:~3.5.0
• ws version:~7.4.2

2.4.0

Related blog post:https://socket.io/blog/socket-io-2-4-0/

Features (from Engine.IO)

• add support for all cookie options (19cc582)
• disable perMessageDeflate by default (5ad2736)

Bug Fixes

• security: do not allow all origins by default (f78a575)
• properly overwrite the query sent in the handshake (d33a619)

⚠️BREAKING CHANGE⚠️

Previously, CORS was enabled by default, which meant that a Socket.IO server sent the necessary CORS headers (Access-Control-Allow-xxx) toany domain. This will not be the case anymore, and you now have to explicitly enable it.

... (truncated)

Sourced fromsocket.io's changelog.

2.4.1 (2021-01-07)

Reverts

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

2.4.0 (2021-01-04)

Bug Fixes

• security: do not allow all origins by default (f78a575)
• properly overwrite the query sent in the handshake (d33a619)

• 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
• d33a619 fix: properly overwrite the query sent in the handshake
• 3951a79 chore: bump engine.io version
• 6fa026f ci: migrate to GitHub Actions
• See full diff incompare view

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