CVE-2026-50630
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk32th percentile - higher than 32% of all known CVEs
Summary
A CRLF injection vulnerability exists in the OAuth2 AuthorizationUtils class. When constructing the WWW-Authenticate response header, the 'realm' parameter is concatenated without sanitizing CR and LF characters. If an attacker controls the realm value, they can inject arbitrary HTTP headers or split the response. Upgrade to versions 4.2.2, 4.1.7, or 3.6.12.
Risk Assessment
An attacker can manipulate HTTP responses, potentially leading to cache poisoning, session hijacking, or other man-in-the-middle attacks.
Recommendation
Upgrade the OAuth2 component to versions 4.2.2, 4.1.7, or 3.6.12. Ensure realm values are properly sanitized.
Other vulnerabilities in Apache CXF OAuth2
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS