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CVE-2026-50623— Apache CXF: Authentication Bypass in OAuth2 TokenIntrospectionService

AI Predicted 6.5 Difficulty: Easy EPSS 0.37% · P29

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProductVersion RangeStatus
Apache Software FoundationApache CXF4.2.0< 4.2.2affected
< 4.1.7affected
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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: NVD (National Vulnerability Database)
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, which fixes this issue.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
认证机制不恰当
Source: NVD (National Vulnerability Database)
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

VendorProductAffected VersionsCPESubscribe
Apache Software FoundationApache CXF 4.2.0 ~ 4.2.2 -

II. Public POCs for CVE-2026-50623

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III. Intelligence Information for CVE-2026-50623

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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-2026-50645Apache CXF: No restriction on attachment headers per message
CVE-2026-50634Apache CXF: WS JSON request filter trusts metadata from an unvalidated first signature ent
CVE-2026-50633Apache CXF: JNDI Injection vulnerability in DispatchMDBMessageListenerImpl
CVE-2026-50632Apache CXF: JNDI Injection Vulnerability in JMSConfigFactory
CVE-2026-50631Apache CXF: OAuth2: TOCTOU Race Condition in Refresh Token Processing
CVE-2026-50630Apache CXF: OAuth2: HTTP Response Splitting via WWW-Authenticate Realm Injection
CVE-2026-50629Apache CXF: OAuth2: Log Injection via Unsanitized Client Identifier
CVE-2026-50628Apache CXF: OAuth2: Inverted IP Binding Check Defeats Security Control
CVE-2026-50627Apache CXF: OAuth2: Missing JWT Audience and Issuer Validation in Access Token Validator
CVE-2026-49875Apache CXF: XML External Entity (XXE) Injection in W3CMultiSchemaFactory and EndpointRefer

IV. Related Vulnerabilities

Same product: Apache CXF
Same vendor: Apache Software Foundation
Same weakness: CWE-287

V. Comments for CVE-2026-50623

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