CVE-2026-50630

MEDIUM

Apache CXF: OAuth2: HTTP Response Splitting via WWW-Authenticate Realm Injection

Title source: cna

Description

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, which fixes this issue.

References (2)

Core 2

Core References

Vendor Advisory vendor-advisory

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

Mailing List

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

Scores

CVSS v3 6.5

EPSS 0.0050

EPSS Percentile 38.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-113

Status published

Products (3)

apache/cxf < 4.1.7

Apache Software Foundation/Apache CXF < 4.1.7

Apache Software Foundation/Apache CXF 4.2.0 - 4.2.2

Published Jun 12, 2026

Tracked Since Jun 12, 2026