CRLF injection in Netty - CVE-2026-59919
Published: July 21, 2026 / Updated: July 21, 2026
Vulnerability identifier: #VU138902
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2026-59919
CWE-ID: CWE-93
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vendor: Netty project
Affected software:
Netty
Netty
Detailed vulnerability description
The vulnerability allows a local user to inject arbitrary data in server response.
The vulnerability exists due to insufficient validation of attacker-supplied data within AF_UNIX address. A local user can pass specially crafted data to the application containing CR-LF characters and modify application behavior.
How to mitigate CVE-2026-59919
Install updates from vendor's website.