CVE-2026-50629

Apache CXF: OAuth2: Log Injection via Unsanitized Client Identifier

State: Published
Severity: 5.3 Medium
Published: Jun 12, 2026
Updated: Aug 7, 2026
Reserved: Jun 5, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	CISA-ADP

Weaknesses

CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')

Affected Products

Product	Versions
Apache CXFApache Software Foundation	4.2.0 to before 4.2.2Affected 4.0.0 to before 4.1.7Affected before 3.6.12Affected

References

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