CVE-2026-50630— Apache CXF: OAuth2: HTTP Response Splitting via WWW-Authenticate Realm Injection
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OAuth2 AuthorizationUtils类构建WWW-Authenticate响应头时未清理回车(CR)和换行(LF)字符，可能导致攻击者控制realm参数，注入任意HTTP头或分割HTTP响应。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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-2026-50630
Vulnerability Information
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Vulnerability Title
Apache CXF: OAuth2: HTTP Response Splitting via WWW-Authenticate Realm Injection
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP头部中CRLF序列转义处理不恰当(HTTP响应分割)
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OAuth2 AuthorizationUtils类构建WWW-Authenticate响应头时未清理回车(CR)和换行(LF)字符，可能导致攻击者控制realm参数，注入任意HTTP头或分割HTTP响应。
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-2026-50630
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|---|
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Mailing List Discussions for CVE-2026-50630 (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-2026-50629 | Apache CXF: OAuth2: Log Injection via Unsanitized Client Identifier | |
| 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 |
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V. Comments for CVE-2026-50630
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