Apache CXF up to 3.6.11/4.1.7/4.2.2 resource consumption

Summaryinfo

A vulnerability identified as problematic has been detected in Apache CXF up to 3.6.11/4.1.7/4.2.2. This impacts an unknown function. The manipulation leads to resource consumption. This vulnerability is traded as CVE-2026-64958. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Apache CXF up to 3.6.11/4.1.7/4.2.2. It has been rated as problematic. This issue affects some unknown functionality. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. The summary by CVE is:

An incomplete fix for CVE-2026-50645 means that it is still possible to perform a denial of service attack on Apache CXF by sending a message with many attachment headers. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

The advisory is shared at lists.apache.org. The identification of this vulnerability is CVE-2026-64958 since 07/21/2026. The exploitation is known to be easy. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/06/2026). MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 3.6.12, 4.1.8 or 4.2.3 eliminates this vulnerability.

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Productinfo

Type

• Application Server Software

Vendor

• Apache

Name

• CXF

Version

• 3.6.0
• 3.6.1
• 3.6.2
• 3.6.3
• 3.6.4
• 3.6.5
• 3.6.6
• 3.6.7
• 3.6.8
• 3.6.9
• 3.6.10
• 3.6.11
• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 4.1.6
• 4.1.7
• 4.2.0
• 4.2.1
• 4.2.2

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

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CPE 2.2info

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