HTTP response splitting in Apache CXF - CVE-2026-50630
Published: August 25, 2026
Vulnerability identifier: #VU145227
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-50630
CWE-ID: CWE-113
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to inject arbitrary HTTP headers or split the HTTP response entirely.
The vulnerability exists due to crlf injection in the OAuth2 AuthorizationUtils class when constructing the WWW-Authenticate response header with an attacker-controlled realm value. A remote attacker can supply a crafted realm value to inject arbitrary HTTP headers or split the HTTP response entirely.
Affected software
Apache CXF
How to mitigate CVE-2026-50630
Install security update from vendor's website.
Apache CXF - addressed in versions 4.1.7, 4.2.2