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CVE-2026-50645— Apache CXF: No restriction on attachment headers per message

AI Predicted 7.5 Difficulty: Easy EPSS 0.62% · P45

Possible ATT&CK Techniques 1AI

T1496 · Resource Hijacking

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-2026-50645

Vulnerability Information
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Vulnerability Title
Apache CXF: No restriction on attachment headers per message
Source: NVD (National Vulnerability Database)
Vulnerability Description
There is no restriction on the amount of attachment headers that a message can contain when being deserialized by Apache CXF, which can lead to uncontrolled resource consumption or a denial of service attack. Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fix this issue by imposing a maximum default of 500 attachments per message.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Apache Software FoundationApache CXF 4.2.0 ~ 4.2.2 -

II. Public POCs for CVE-2026-50645

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III. Intelligence Information for CVE-2026-50645

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Mailing List Discussions for CVE-2026-50645 (1)

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

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

IV. Related Vulnerabilities

Same product: Apache CXF
Same vendor: Apache Software Foundation
Same weakness: CWE-400

V. Comments for CVE-2026-50645

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