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CVE-2026-50629— Apache CXF: OAuth2: Log Injection via Unsanitized Client Identifier

Quick assessment

Affected
Apache Software Foundation Apache CXF
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache cxf是美国Apache基金会开源的一个Web服务开发框架。 Apache CXF 4.1.7之前版本和4.2.0至4.2.2之前版本存在输入验证错误漏洞，该漏洞源于clientId参数未清理控制字符，可能导致攻击者注入任意内容到服务器日志文件。

AI Predicted 5.3 Difficulty: Easy EPSS 0.70% · P52

Possible ATT&CK Techniques 1 AI

T1565.003 · Runtime Data Manipulation

Affected Version Matrix 3

VendorProduct Version RangeStatus
Apache Software Foundation Apache CXF 4.2.0< 4.2.2 affected
4.0.0< 4.1.7 affected
< 3.6.12 affected
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I. Basic Information for CVE-2026-50629

Vulnerability Information
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Vulnerability Title
Apache CXF: OAuth2: Log Injection via Unsanitized Client Identifier
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对CRLF序列的转义处理不恰当(CRLF注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache CXF 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache cxf是美国Apache基金会开源的一个Web服务开发框架。 Apache CXF 4.1.7之前版本和4.2.0至4.2.2之前版本存在输入验证错误漏洞，该漏洞源于clientId参数未清理控制字符，可能导致攻击者注入任意内容到服务器日志文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache CXF 4.2.0 ~ 4.2.2 -

II. Public POCs for CVE-2026-50629

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III. Intelligence Information for CVE-2026-50629

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Mailing List Discussions for CVE-2026-50629 (1)

Same Patch Batch · Apache Software Foundation · 2026-06-12 · 11 CVEs total

CVE-2026-50645 Apache CXF: No restriction on attachment headers per message
CVE-2026-50634 Apache CXF: WS JSON request filter trusts metadata from an unvalidated first signature ent
CVE-2026-50633 Apache CXF: JNDI Injection vulnerability in DispatchMDBMessageListenerImpl
CVE-2026-50632 Apache CXF: JNDI Injection Vulnerability in JMSConfigFactory
CVE-2026-50631 Apache CXF: OAuth2: TOCTOU Race Condition in Refresh Token Processing
CVE-2026-50630 Apache CXF: OAuth2: HTTP Response Splitting via WWW-Authenticate Realm Injection
CVE-2026-50628 Apache CXF: OAuth2: Inverted IP Binding Check Defeats Security Control
CVE-2026-50627 Apache CXF: OAuth2: Missing JWT Audience and Issuer Validation in Access Token Validator
CVE-2026-49875 Apache CXF: XML External Entity (XXE) Injection in W3CMultiSchemaFactory and EndpointRefer
CVE-2026-50623 Apache CXF: Authentication Bypass in OAuth2 TokenIntrospectionService

IV. Related Vulnerabilities

Same product: Apache CXF
Same vendor: Apache Software Foundation
Same weakness: CWE-93

V. Comments for CVE-2026-50629

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