CVE-2026-50623— Apache CXF: Authentication Bypass in OAuth2 TokenIntrospectionService
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之前版本存在授权问题漏洞，该漏洞源于OAuth2 TokenIntrospectionService在安全上下文检查中缺少'throw'关键字，可能导致未经身份验证的网络攻击者访问 introspection 端点（/services/oauth2/introspect）。
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-2026-50623
Vulnerability Information
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Vulnerability Title
Apache CXF: Authentication Bypass in OAuth2 TokenIntrospectionService
Source: CVE Program / CVE List V5
Vulnerability Description
An authentication bypass vulnerability exists in the OAuth2 TokenIntrospectionService in Apache CXF. Due to a missing 'throw' keyword in the security context check, the introspection endpoint (/services/oauth2/introspect) can be accessed by any unauthenticated network attacker. However note that this is a safeguard only in the case that someone forgot to enable authentication on the service. Users are recommended to upgrade to version 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
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Apache CXF 授权问题漏洞
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之前版本存在授权问题漏洞，该漏洞源于OAuth2 TokenIntrospectionService在安全上下文检查中缺少'throw'关键字，可能导致未经身份验证的网络攻击者访问 introspection 端点（/services/oauth2/introspect）。
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-2026-50623
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2026-50623 (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-2026-50629 | 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 |
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