Live › vulnerability › CVE-2026-91418
Go to dashboardA flaw in the ImageIO component of Oracle Java SE, JavaFX and GraalVM lets an unauthenticated attacker over the network cause a partial denial of service. The sources say it is reachable through web services that pass data to the affected APIs, and it also applies to sandboxed Java applets and Web Start apps that run untrusted code.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
Teams running the listed Oracle Java SE, JavaFX, GraalVM for JDK or GraalVM Enterprise builds that process images or other data through ImageIO, especially network services that accept user-supplied input. Systems that do not run these Java versions, or that never call ImageIO on untrusted data, can skip it; sandboxed client applets are also in scope per the description.
No product ranges from the sources yet.
java -version and compare the build against the affected releases listed in the sources (for example 8u503, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1)javax.imageio or java.desktop image reading on data from untrusted sources8u503 or later for 8, 11.0.32.1 or later for 11, 17.0.20.1 or later for 17, 21.0.12.1 or later for 21, 25.0.4.1 or later for 25)21.0.12, 25.0.4 or 27, and GraalVM for JDK to 17.0.20.1 or 21.0.12.1 where usedEach row is the first time that source carried this signal. The analyst’s rows are its own findings.
Vulnerability in the Oracle Java SE, Oracle JavaFX, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: ImageIO). Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27; Oracle JavaFX: 21.0.12, 25.0.4, 27; Oracle GraalVM for JDK: 17.0.20.1 and 21.0.12.1; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle JavaFX, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE, Oracle JavaFX, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. 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).
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