Oracle Java SE 21.0.12.1/25.0.4.1/27 Compiler privileges management

Summaryinfo

A vulnerability was found in Oracle Java SE 21.0.12.1/25.0.4.1/27 and classified as critical. This vulnerability affects unknown code of the component Compiler. Such manipulation leads to privileges management. This vulnerability is uniquely identified as CVE-2026-83378. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Oracle Java SE 21.0.12.1/25.0.4.1/27. It has been rated as critical. Affected by this issue is an unknown code of the component Compiler. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Vulnerability in Oracle Java SE (component: Compiler). Supported versions that are affected are Oracle Java SE: 21.0.12.1, 25.0.4.1 and 27. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE accessible data as well as unauthorized read access to a subset of Oracle Java SE accessible data. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 4.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).

The advisory is available at oracle.com. This vulnerability is handled as CVE-2026-83378 since 08/31/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 10/21/2026). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Programming Language Software

Vendor

• Oracle

Name

• Java SE

Version

• 21.0.12.1
• 25.0.4.1
• 27

License

• open-source

Website

• Vendor: https://www.oracle.com

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