CVE-2026-50629

MediumCVSS 5.3

Published: 12/06/2026(UTC)Updated: 05/11/2026(UTC)Translated: 07/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.44%

38th percentile - higher than 38% of all known CVEs

Summary

The 'clientId' parameter from incoming HTTP requests is directly concatenated into OAuth2 server log warning messages without sanitizing control characters. This allows an attacker to inject arbitrary content, including fake log entries, into server log files. Upgrade to versions 4.2.2, 4.1.7, or 3.6.12.

Risk Assessment

Log manipulation can hinder attack detection, cover tracks, or mislead administrators during security analysis.

Recommendation

Upgrade the OAuth2 component to versions 4.2.2, 4.1.7, or 3.6.12. Additionally, consider filtering control characters at the input level.

Other vulnerabilities in Apache CXF OAuth2

CVE-2026-50630Medium
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.

Original NVD description (English source)

The 'clientId' parameter from incoming HTTP requests is directly concatenated into OAuth2 server log warning messages without sanitizing control characters. This allows an attacker to inject arbitrary content, including fake log entries, into the server's log files. 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