CVE-2026-50645: CWE-400 Uncontrolled Resource Consumption in Apache Software Foundation Apache CXF
Apache CXF versions prior to 4.1.7, 4.2.2, and 3.6.12 allow an unlimited number of attachment headers during message deserialization. This lack of restriction can lead to uncontrolled resource consumption, potentially causing denial of service (DoS) conditions. The issue is addressed by imposing a default maximum of 500 attachments per message in the fixed versions.
AI Analysis
Technical Summary
CVE-2026-50645 is a vulnerability in Apache CXF where the deserialization process does not limit the number of attachment headers in a message. This can result in excessive resource consumption, leading to denial of service. The Apache Software Foundation fixed this issue by introducing a maximum default limit of 500 attachments per message in versions 4.2.2, 4.1.7, and 3.6.12.
Potential Impact
An attacker can exploit this vulnerability by sending messages with a large number of attachment headers, causing the affected Apache CXF service to consume excessive resources and potentially become unavailable. The CVSS score of 7.5 (high) reflects the potential for denial of service without requiring privileges or user interaction.
Mitigation Recommendations
Users are recommended to upgrade to Apache CXF versions 4.2.2, 4.1.7, or 3.6.12, which include a fix that imposes a maximum default of 500 attachments per message. No other mitigation is indicated by the vendor advisory.
CVE-2026-50645: CWE-400 Uncontrolled Resource Consumption in Apache Software Foundation Apache CXF
Description
Apache CXF versions prior to 4.1.7, 4.2.2, and 3.6.12 allow an unlimited number of attachment headers during message deserialization. This lack of restriction can lead to uncontrolled resource consumption, potentially causing denial of service (DoS) conditions. The issue is addressed by imposing a default maximum of 500 attachments per message in the fixed versions.
CVSS v3.1
Score 7.5high
Affected software
Apache Software Foundation
Apache CXF
pkg:maven/Apache Software Foundation/org.apache.cxf:cxf-coreRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-50645 is a vulnerability in Apache CXF where the deserialization process does not limit the number of attachment headers in a message. This can result in excessive resource consumption, leading to denial of service. The Apache Software Foundation fixed this issue by introducing a maximum default limit of 500 attachments per message in versions 4.2.2, 4.1.7, and 3.6.12.
Potential Impact
An attacker can exploit this vulnerability by sending messages with a large number of attachment headers, causing the affected Apache CXF service to consume excessive resources and potentially become unavailable. The CVSS score of 7.5 (high) reflects the potential for denial of service without requiring privileges or user interaction.
Mitigation Recommendations
Users are recommended to upgrade to Apache CXF versions 4.2.2, 4.1.7, or 3.6.12, which include a fix that imposes a maximum default of 500 attachments per message. No other mitigation is indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-05T14:05:01.499Z
- State
- PUBLISHED
Threat ID: 6a2bd75fe617e2d83448c009
Added to database: 06/12/2026, 09:54:39 UTC
Last enriched: 08/14/2026, 16:24:32 UTC
Last updated: 09/15/2026, 04:29:37 UTC
Views: 387
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