Apache Karaf up to 4.4.10 XmlUtils resource consumption

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Apache Karaf up to 4.4.10. This impacts an unknown function of the component XmlUtils. This manipulation causes resource consumption. This vulnerability is registered as CVE-2026-92230. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Apache Karaf up to 4.4.10. Affected by this vulnerability is an unknown functionality of the component XmlUtils. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

Apache Karaf's XmlUtils cached XML parser/transformer factories in static ThreadLocal fields on long-lived container threads. Because a ThreadLocal value outlives the OSGi bundle that created it, repeated bundle or feature install, update, or refresh operations can leave successive bundle ClassLoader's pinned in memory and unreachable for garbage collection, leading to unbounded Metaspace growth and eventual denial of service of the Karaf instance.

It is possible to read the advisory at lists.apache.org. This vulnerability is known as CVE-2026-92230 since 09/15/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation requires an enhanced level of successful authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 4.4.11 eliminates this vulnerability.

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Productinfo

Vendor

• Apache

Name

• Karaf

Version

• 4.4.0
• 4.4.1
• 4.4.2
• 4.4.3
• 4.4.4
• 4.4.5
• 4.4.6
• 4.4.7
• 4.4.8
• 4.4.9
• 4.4.10

License

• open-source

Website

• Vendor: https://www.apache.org/

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