Live › vulnerability › CVE-2026-91334
Go to dashboardA flaw in the ImageIO component of Oracle Java SE and GraalVM lets an unauthenticated remote attacker read a subset of accessible data. Exploitation is difficult and is possible through web services that pass data to the affected APIs, and through sandboxed Java applets or Web Start apps.
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 Oracle Java SE or GraalVM builds that include the affected releases, especially services that use ImageIO on data from outside the network. Client machines that run untrusted Java applets or Web Start apps are also in scope. Systems on patched releases or without Java installed can skip it.
No product ranges from the sources yet.
java -version and compare against the affected releases: 8u503, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27.8u503 or later in 8, 11.0.32.1+ in 11, 17.0.20.1+ in 17, 21.0.12.1+ in 21, 25.0.4.1+ in 25.17.0.20.1 or 21.0.12.1 or later.21.3.19.1.1.Each 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 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 GraalVM for JDK: 17.0.20.1 and 21.0.12.1; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition 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 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N).
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