CVE-2026-62380
Netty before 4.2.16.Final SOCKS Proxy Null Byte Injection
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.
INFO
Published Date :
Aug. 22, 2026, 1:16 p.m.
Last Modified :
Aug. 22, 2026, 1:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-62380
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Netty to version 4.2.17.Final or 4.1.137.Final.
- Apply relevant patches if updating is not possible.
- Validate domain address and authentication fields.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-62380.
| URL | Resource |
|---|---|
| https://github.com/netty/netty/security/advisories/GHSA-cc6x-ffm5-83wf | |
| https://www.vulncheck.com/advisories/netty-before-final-socks-proxy-null-byte-injection |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-62380 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-62380
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-62380 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-62380 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Aug. 22, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'netty', 'product': 'netty', 'versions': [{'status': 'affected', 'version': '4.2.0.Final', 'lessThan': '4.2.16.Final', 'versionType': 'custom'}, {'status': 'unaffected', 'version': '4.2.16.Final', 'versionType': 'custom'}], 'packageURL': 'pkg:maven/io.netty/netty-codec-socks', 'defaultStatus': 'unaffected'}, {'vendor': 'netty', 'product': 'netty', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '4.1.137.Final', 'versionType': 'custom'}, {'status': 'unaffected', 'version': '4.1.137.Final', 'versionType': 'custom'}], 'packageURL': 'pkg:maven/io.netty/netty-codec-socks', 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 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 Added CWE CWE-626 Added Reference https://github.com/netty/netty/security/advisories/GHSA-cc6x-ffm5-83wf Added Reference https://www.vulncheck.com/advisories/netty-before-final-socks-proxy-null-byte-injection