Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-62380— Netty before 4.2.16.Final SOCKS Proxy Null Byte Injection

Quick assessment

Affected
netty netty
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Netty是Netty团队开源的一个高性能网络通信框架。 Netty 4.2.0.Final版本至4.2.16.Final版本和4.1.x版本至4.1.136.Final版本存在输入验证错误漏洞，该漏洞源于SOCKS4和SOCKS5客户端编码器未验证域地址和认证（用户名/密码）字段，导致空字节、CRLF和凭据注入，可能导致域欺骗、SOCKS4用户ID截断、认证数据注入和协议混淆。

CVSS 6.3 · Medium EPSS 0.25% · P16

Affected Version Matrix 4

VendorProduct Version RangeStatus
netty netty 4.2.0.Final< 4.2.16.Final affected
4.2.16.Final unaffected
< 4.1.137.Final affected
4.1.137.Final unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-62380

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Netty before 4.2.16.Final SOCKS Proxy Null Byte Injection
Source: CVE Program / CVE List V5
Vulnerability Description
Netty (io.netty:netty-codec-socks) versions 4.2.0.Final through 4.2.16.Final and 4.1.x through 4.1.136.Final contain null byte, CRLF, and credential injection vulnerabilities in the SOCKS4 (Socks4ClientEncoder) and SOCKS5 (Socks5ClientEncoder) client encoders, which fail to validate domain address and authentication (username/password) fields. An attacker able to control these fields can inject null bytes or CRLF characters to truncate or alter values, potentially enabling domain spoofing, SOCKS4 userid truncation, authentication data injection, and protocol confusion. Fixed in 4.2.17.Final and 4.1.137.Final.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
空字节交互错误
Source: CVE Program / CVE List V5
Vulnerability Title
Netty 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Netty是Netty团队开源的一个高性能网络通信框架。 Netty 4.2.0.Final版本至4.2.16.Final版本和4.1.x版本至4.1.136.Final版本存在输入验证错误漏洞，该漏洞源于SOCKS4和SOCKS5客户端编码器未验证域地址和认证（用户名/密码）字段，导致空字节、CRLF和凭据注入，可能导致域欺骗、SOCKS4用户ID截断、认证数据注入和协议混淆。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
netty netty 4.2.0.Final ~ 4.2.16.Final -
netty netty 0 ~ 4.1.137.Final -

II. Public POCs for CVE-2026-62380

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-62380

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-62380 (2)

IV. Related Vulnerabilities

Same product: netty
Same vendor: netty
Same weakness: CWE-626

V. Comments for CVE-2026-62380

No comments yet

Leave a comment