CVE-2026-50630 — Apache CXF: OAuth2: HTTP Response Splitting via WWW-Authenticate Realm Injection

Description (CNA)

A CRLF injection vulnerability exists in the OAuth2 AuthorizationUtils class. When constructing the WWW-Authenticate response header, the 'realm' parameter is concatenated without sanitizing Carriage Return (CR) and Line Feed (LF) characters. If an attacker can control the realm value, they can inject arbitrary HTTP headers or split the HTTP response entirely. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.

Affected (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache CXF	affected 4.2.0 before 4.2.2; affected 4.0.0 before 4.1.7; affected 0 before 3.6.12

CWE

CWE-113

References

https://lists.apache.org/thread/bt7vnjzzkpd6vdhkxv103poor1jy5trm

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/06/11/7

CISA-ADP

No English description supplied.

No references supplied.