v5.18.0 is released. (unstable version)
New Features
Add Hysteria2 Protocol
Add AllowInsecureIfPinnedPeerCertificate option to tls security
Add tls certChainHash command
Add support for socket activation
Add pprof flag for debugging

v5.19.0 is released. (unstable version)
New Features
Add packetEncoding for Hysteria 2

v5.20.0 is released. (unstable version)
New Features
Add ECH Client Support
Add support for parsing some shadowsocks links

v5.21.0 is released. (unstable version)
New Features
Mekya: Add Mekya Transport

v5.22.0 is released. (unstable version)
Maintenance release.

v5.24.0 is released. (unstable version)
New Features
HTTPUpgrade Add Early Data and Custom Header Support to HTTPUpgrade Transport

Celebrate HTTPUpgrade Protocol's New EarlyData Support with a Public Proxy Server
为了庆祝 HTTPUpgrade 传输协议加入前置数据支持，现给大家限时提供一个公用的服务器用于测试。配置信息可能会被更新(更新了*1）。
https://github.com/v2fly/v2ray-core/discussions/3277

v5.25.0 is released. (unstable version)
New Features
Subscription: Add support for URLLine format subscription container.
Subscription: Add gRPC API support.

v5.25.1 is released. (unstable version)
New Features
Subscription: Add support for URLLine format subscription container.
Subscription: Add gRPC API support.
Fix: Broken release binary for linux-amd64 and linux-arm64 as a result of mixing static build and pie build.

v5.27.0 is released. (unstable version)
New Features
Persistent Storage: Add Persistent Storage Support to V2Ray.
Background Observatory: Add Persistent Storage of probe result for Background Observatory.

v5.28.0 is released. (unstable version)
New Features
Subscription: Add Persistence to Subscription Imports, plus Subscription Update API

v5.29.0 is released. (unstable version)
New Features
Enable restricted mode load for http protocol client
Fixes
Correctly implement QUIC sniffer when handling multiple initial packets

v5.30.0 is released. (unstable version)
New Features
Add Dns Proxy Response TTL Control

v5.31.0 is released. (unstable version)
This is a maintenance release contains a security update for utls.

v5.35.0 is released. (stable version)
New Features
fix false success from SOCKS server when Dispatch() fails
HTTP inbound: Directly forward plain HTTP 1xx response header

v5.36.0 is released. (unstable version)
New Features
Add TLSMirror looks like TLS censorship resistant transport protocol as a developer preview transport
proxy dns with NOTIMP error

TLSMirror: Looks like TLS Censorship Resistant Transport Protocol is Looking for Developer Feedback
https://github.com/net4people/bbs/issues/496

v5.37.0 is released. (unstable version)
New Features
Add TLSMirror looks like TLS censorship resistant transport protocol as a developer preview transport
Update TLS Mirror with TLS1.2 AEAD support, defer_instance_derived_write_time, transport_layer_padding, h2_do_not_wait_for_download_finish
proxy dns with NOTIMP error
This update includes important fix for developer preview protocol TLSMirror.
本更新含针对于开发者预览版协议 TLSMirror 的重要修复。

v5.40.0 is released. (unstable version)
New Features
Add transient storage lifecycle receiver framework (fix grpc transport goroutine leak)

v5.41.0 is released. (unstable version)
This is a maintenance release.
This release includes an important fix for utls, update recommended for all users.