CVE-2026-91333 Vulnerability in Oracle Java SE (component: Security).
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-91333?
CVE-2026-91333 is a low-severity vulnerability in Oracle Java SE, published on 20 Oct 2026.
Official description
Vulnerability in Oracle Java SE (component: Security). 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. 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 3.7 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N).
Weakness: CWE-502
Which versions are affected by CVE-2026-91333?
How do I fix CVE-2026-91333?
Upgrade to a fixed version.
Is CVE-2026-91333 being exploited?
There is no known exploitation of CVE-2026-91333 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-91333, GHSA-w3cp-rgcc-6q3q, UBUNTU-CVE-2026-91333.