CVE-2026-71054 Denial of service in Oracle Java SE
An unauthenticated attacker can cause a complete denial of service in Oracle Java SE via network access, affecting Java deployments running untrusted code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-71054?
CVE-2026-71054 is a medium-severity denial of service vulnerability in Oracle Java SE, published on 26 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Vulnerability in Oracle Java SE (component: 2D). Supported versions that are affected are Oracle Java SE: 7u511. 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 hang or frequently repeatable crash (complete 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 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L).
Weakness: CWE-770
Which versions are affected by CVE-2026-71054?
How do I fix CVE-2026-71054?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-71054 being exploited?
There is no known exploitation of CVE-2026-71054 in the wild and no public exploit code.
Sources
Also known as GHSA-9wxj-fccf-76pg.