Oracle Java SE up to 26.0.1 Libraries resource consumption

Summaryinfo

A vulnerability marked as problematic has been reported in Oracle Java SE up to 26.0.1. This affects an unknown part of the component Libraries. The manipulation leads to resource consumption. This vulnerability is traded as CVE-2026-47027. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Oracle Java SE up to 26.0.1 and classified as problematic. This issue affects an unknown code of the component Libraries. 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:

Vulnerability in Oracle Java SE (component: Libraries). Supported versions that are affected are Oracle Java SE: 8u491, 8u491-perf, 11.0.31, 17.0.19, 21.0.11, 25.0.3, 26.0.1; Oracle GraalVM for JDK: 17.0.19 and 21.0.11; Oracle GraalVM Enterprise Edition: 21.3.18. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

It is possible to read the advisory at oracle.com. The identification of this vulnerability is CVE-2026-47027 since 05/18/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/22/2026). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Programming Language Software

Vendor

• Oracle

Name

• Java SE

Version

• 8u491
• 8u491-perf
• 11.0.31
• 17.0.19
• 21.0.11
• 25.0.3
• 26.0.1

License

• open-source

Website

• Vendor: https://www.oracle.com

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