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Due to increase in size of the geoip.dat file recently, devices with insufficient ROM/RAM are experiencing difficulties in using V2Ray. The solution is as follows:

* For RAM insufficient devices: Enable the Geodata loader optimized for memory-constrained devices by setting the environment variable V2RAY_CONF_GEOLOADER to value memconservative. For more details, see [documentation](https://www.v2fly.org/config/env.html#geodata-%E6%96%87%E4%BB%B6%E5%8A%A0%E8%BD%BD%E5%99%A8).
* For ROM insufficient devices:
* Use the newly added GeoIP file geoip-only-cn-private.dat in the zip package or download it from [release page](https://github.com/V2Fly Notification and Updates V2Ray the second new/com.v2fly/geoip/releases), which only contains GeoIP list geoip:cn and geoip:private, or
* Customize your own GeoIP file via project [v2fly/geoip](https://github.com/V2Fly Notification and Updates V2Ray the second new/com.v2fly/geoip).
v4.44.0 is released. (Stable, Security Release)

This release includes security enhancement for all users.

!!! Important SECURITY enhancement !!!
* Fix DoS attack vulnerability in CommandSwitchAccountFactory. (Thanks geeknik)

Security Advisory
This update fixes a DoS vulnerability in V2Ray. This vulnerability allows a VMess Server controlled by an attacker to crash a VMess Client by sending a specially crafted handshake response reply with an (optional) VMess SwitchAccount Command that is one byte shorter than expected. This vulnerability does NOT allow the attacker to retrieve any information from a client other than it used an unpatched version of the software and does NOT allow attacker to control the unpatched software or system. It is strongly recommended for all users to apply this security update at the earliest possible opportunity. We would like to thank geeknik for the responsible disclosure of this vulnerability.

此更新修复了在 V2Ray 中的一个拒绝服务攻击漏洞。这个漏洞允许攻击者控制的 VMess 服务器迫使 VMess 客户端崩溃。这个漏洞可以通过在 VMess 握手阶段向客户端发送一个恶意的回复数据包被触发,触发漏洞数据包的内容是比正确内容少一个字节的 VMess 切换账户指令。 攻击者 *无法* 通过这个漏洞获取来自客户端任何信息(除客户端尚未应用此安全更新以外),也 *不会* 允许攻击者控制客户端软件或系统。强烈推荐所有用户在第一时间应用本安全更新。我们在此感谢 geeknik 将此漏洞负责任的披露给我们。
v4.45.2 v5.0.7 is released. (Security Release)
This release includes security enhancement for all users.

## !!! Important SECURITY enhancement !!!
* Fix DoS attack vulnerability in VMess Option Processing. (Thanks @nekohasekai )

## Security Advisory
This update fixes a DoS vulnerability in V2Ray. This vulnerability allows a VMess Client with authentication information controlled by an attacker to crash a VMess Server by sending a specially crafted VMess handshake message with an invalid option or encryption type. This vulnerability does NOT allow the attacker to retrieve any information(other than it used an unpatched version of the software) and does NOT allow an attacker to control the unpatched software or system. It is strongly recommended for all users to apply this security update at the earliest possible opportunity. We would like to thank @nekohasekai for the discovery of this vulnerability.

此更新修复了在 V2Ray 中的一个拒绝服务攻击漏洞。这个漏洞允许攻击者控制的拥有认证信息的 VMess 客户端迫使 VMess 服务器端崩溃。这个漏洞可以通过在 VMess 握手阶段由客户端发送一个恶意的数据包被触发,触发漏洞数据包拥有无效的选项或加密方式。 攻击者 无法 通过这个漏洞获取任何信息(除客户端尚未应用此安全更新以外),也 不会 允许攻击者控制客户端软件或系统。强烈推荐所有用户在第一时间应用本安全更新。我们在此感谢 @nekohasekai 发现此漏洞。

Edit: Fixed a typo. Last version of this document withdrawn.
v5.2.1 User Preview is released. (stable version)

New Features
uTLS: TLS Client Hello imitation
DNS: Support per-client configuration
DNS: Support specifying domain matcher
Add bind to device to Windows and Darwin.
Replace default Health Ping URL to HTTPS for burst observatory.
Implement Match and MatchAny for all MatcherGroup, IndexMatcher

It also includes fixes to known issues, please refer to release note for more info.
v5.3.0 User Preview is released. (stable version)

New Features
uTLS: uTLS APLN Control

It also includes fixes to known issues, please refer to release note for more info.
v5.5.0 User Preview is released. (stable version)

It includes fixes to known issues, please refer to release note for more info.
v5.6.0 User Preview is released. (unstable version)

New Features
HTTP Proxy: Add h1SkipWaitForReply Option to HTTP Proxy Protocol; This allow you to run a V2Ray compatible HTTP Proxy server over WebSocket protocol on workerd.
set v2ray binary as an entrypoint in container images
In the upcoming release, we are adding support for a new transport: meek. It is highly censorship resistant by converting stream into plain HTTP request/responses, allowing it to be reflected by any service that can relay HTTP request/responses.

在下个版本中将包含新传输协议 meek 。此协议可以将连接转换为一般 HTTP 请求回复, 以期使用任何支持转发 HTTP 请求的服务来转发 meek 连接,无需再担心 IP 被封锁, WebSocket CDN 被阻碍的问题。这个协议的速度很有限,不求跑满万兆带宽,只愿送抵万金家书。
v5.7.0 User Preview is released. (unstable version)

New Features
meek transport: plain HTTP request/response based transport. Its traffic can be forwarded by any service that can forward HTTP traffics.
v5.9.0 User Preview is released. (stable version)
New Features
Tun service: It allows the creation of tun interface that accept network packet and convert them to stream based traffic. This is an alternative method of transparent proxy. It is supported on arm64 and amd64 version of Linux operating system.
uTLS h2 transport support.
v5.10.1 User Preview is released.
New Features
HTTPUpgrade transport: It is a reduced version of WebSocket Transport that can pass many reverse proxies and CDNs without running a WebSocket protocol stack. We have a questionnair ready for you once you tried to deploy it. It will help us improve this transport and V2Ray. 新功能:HTTPUpgrade 传输协议,精简版 WebSocket 免去使用Websocket 协议栈的同时还能继续被反向代理CDN转发。在您尝试部署后欢迎填写问卷反馈体验帮助 V2Ray 改进。问卷支持中文。
There was some transient(hopefully) instability of GitHub that shows a 404 result for some of V2Ray/Fly's repo, however, do not panic, we are here to stay and stand with you. 目前GitHub出现了一些临时(但愿) 的异常以至于V2的仓库出现404无法访问异常。不要惊慌,因为我们不屈不渝,与你同在!
v5.12.0 User Preview is released. (unstable version)
New Features
Shadowsocks2022 Client Support
Apply DomainStrategy to outbound target
Add DomainStrategy to JSONv5 outbound
Notice of Behavior Changes of domain-list database

Starting release 20240221053250 of v2fly/domain-list-community, geolocation-!cn no longer includes tld-!cn as changed by commit d59e0d4.
We are planning to release a security update. Please update your configuration to work with v5.13.0 version to receive the security update when it is published. Be aware as an open source project, the vulnerability is disclosed as soon as the fix is released.
我们正在计划发布一个安全更新。请更新您的配置文件至可以在v5.13.0版本中使用以便在第一时间可以接收安全更新。需要注意的是,作为作为一个开源软件,漏洞的原理会在安全发布的同时公开。
v5.14.0 User Preview

## Security Update
• Fixed an encrypted traffic's malleable vulnerability that allow integrity corruption by an attacker with privileged network position to silently drop a segment of traffic from an encrypted traffic stream. Thanks Ellis Fenske for reporting this vulnerability.

-----> ⚠️ Important Message ⚠️<-----
This update includes security fix recommended for all users.
-----> ⚠️ 重要消息 ⚠️<-----
本更新含适用于所有用户的安全更新。
2024/03/29 07:12:36
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