CVE-2026-50629: CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection') in Apache Software Foundation Apache CXF
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, which fixes this issue.
AI Analysis
Technical Summary
Apache CXF versions prior to 4.1.7 and versions from 4.2.0 up to but not including 4.2.2 improperly handle the 'clientId' parameter in OAuth2 server log warnings by directly concatenating it without neutralizing CRLF sequences. This vulnerability (CWE-93) enables attackers to inject arbitrary content into server logs, potentially misleading log analysis or hiding malicious activity. The vendor has addressed the issue in versions 4.1.7 and 4.2.2.
Potential Impact
An attacker can inject arbitrary content, including fake log entries, into the server's log files by exploiting the unsanitized 'clientId' parameter. This can lead to log poisoning, which may hinder forensic investigations or monitoring activities. There is no indication of direct compromise of the server or data, but log integrity is affected.
Mitigation Recommendations
Users should upgrade Apache CXF to version 4.2.2 or 4.1.7, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated. Patch status is confirmed by the vendor's recommended upgrade versions.
CVE-2026-50629: CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection') in Apache Software Foundation Apache CXF
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, which fixes this issue.
Affected software
pkg:maven/Apache Software Foundation/org.apache.cxf:cxf-rt-rs-security-oauth2Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Apache CXF versions prior to 4.1.7 and versions from 4.2.0 up to but not including 4.2.2 improperly handle the 'clientId' parameter in OAuth2 server log warnings by directly concatenating it without neutralizing CRLF sequences. This vulnerability (CWE-93) enables attackers to inject arbitrary content into server logs, potentially misleading log analysis or hiding malicious activity. The vendor has addressed the issue in versions 4.1.7 and 4.2.2.
Potential Impact
An attacker can inject arbitrary content, including fake log entries, into the server's log files by exploiting the unsanitized 'clientId' parameter. This can lead to log poisoning, which may hinder forensic investigations or monitoring activities. There is no indication of direct compromise of the server or data, but log integrity is affected.
Mitigation Recommendations
Users should upgrade Apache CXF to version 4.2.2 or 4.1.7, where this vulnerability is fixed. No other mitigation or temporary workaround is indicated. Patch status is confirmed by the vendor's recommended upgrade versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-05T10:55:14.302Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2bd75be617e2d83448bfb6
Added to database: 6/12/2026, 9:54:35 AM
Last enriched: 6/12/2026, 10:10:20 AM
Last updated: 6/12/2026, 12:11:58 PM
Views: 6
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