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.

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Fri, 12 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 12 Jun 2026 11:15:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache cxf
Vendors & Products Apache
Apache cxf

Fri, 12 Jun 2026 10:30:00 +0000

Type Values Removed Values Added
References

Fri, 12 Jun 2026 09:45:00 +0000

Type Values Removed Values Added
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.
Title Apache CXF: OAuth2: HTTP Response Splitting via WWW-Authenticate Realm Injection
Weaknesses CWE-113
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-06-12T14:03:22.085Z

Reserved: 2026-06-05T10:57:56.617Z

Link: CVE-2026-50630

cve-icon Vulnrichment

Updated: 2026-06-12T09:28:07.644Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-06-12T10:16:22.950

Modified: 2026-06-12T13:08:47.310

Link: CVE-2026-50630

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-12T11:00:05Z

Weaknesses