CVEFinder.io

CVE-2026-62380

⚠️ high
Summary

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, SOCKS

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.

CVSS Score
7.5
High
EPSS Score
0.3
Exploit Probability
Published Date
2026-08-22
First Seen: 2026-08-23
📊 Relative Risk Intelligence

This CVE is Moderate Risk - more severe than 67.8% of all 365,890 vulnerabilities in our database.

#117,965
Above average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Aug 26, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Partial
Limited system impact
SSVC data provided by CISA
Last Modified 2026-10-14
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS Vector 4.0 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE IDs (Weakness Types)
CWE-626

📦 Affected Products 2

Vendor Product Status Affected Versions
netty netty Affected
< 4.1.137
netty netty Affected
> 4.2.0 < 4.2.17

🔗 References 2

https://github.com/netty/netty/security/advisories/G...
Vendor Advisory
https://www.vulncheck.com/advisories/netty-before-fi...
Third Party Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-89044 🔶 medium 6.5 0.4 Netty versions 4.1.133.Final through 4.1.137.Final and 4.2.13.Final through 4.2.17.Final fail to properly validate the f... 2026-09-10
CVE-2026-75595 ⛔ critical 9.1 0.5 Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Fina and 4.2.17.Final, io.netty.h... 2026-08-19
CVE-2026-75596 ⚠️ high 7.5 0.7 Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, the defau... 2026-08-19
CVE-2026-59902 ⚠️ high 7.5 0.7 Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.... 2026-08-17
CVE-2026-59903 🔶 medium 6.5 0.3 Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.... 2026-08-17
CVE-2026-73507 ⚠️ high 7.5 0.8 Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.... 2026-08-13
These CVEs affect the same products