Description
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).
Published: 2026-10-20
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Partial Denial of Service (Availability)
Action: Patch
AI Analysis

Impact

A flaw in the ImageIO component of Oracle Java SE, JavaFX, and GraalVM allows an attacker with network access to send crafted data through multiple protocols, causing the system to become partially unavailable. The vulnerability does not grant code execution or data exfiltration; its primary effect is to trigger resource exhaustion that can lead to a temporary denial of service. The reported CVSS score of 5.3 reflects a moderate risk focused solely on availability.

Affected Systems

Affected Oracle products include Java SE versions 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1 and 27; JavaFX versions 21.0.12, 25.0.4 and 27; GraalVM for JDK versions 17.0.20.1 and 21.0.12.1; and GraalVM Enterprise Edition version 21.3.19.1.1. All these products rely on the vulnerable ImageIO component and are exposed to the described denial‑of‑service exploits.

Risk and Exploitability

The CVSS base score of 5.3 indicates moderate severity, with the attack vector assumed to be network and the required privileges none. The EPSS score of < 1% indicates a very low but nonzero likelihood of exploitation, though the vulnerability is described as easily exploitable against any instance that processes untrusted image inputs. The vulnerability is not listed in CISA’s KEV catalog, but it can still impact high‑traffic web services or applications that routinely load images from external sources, potentially leading to temporary service degradation.

Generated by OpenCVE AI on October 23, 2026 at 04:40 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Upgrade to a patched version of Oracle Java SE, JavaFX, GraalVM for JDK, or GraalVM Enterprise Edition that includes the ImageIO fix
  • If a patch cannot be applied immediately, limit exposure of the vulnerable ImageIO APIs by validating or sanitizing all incoming image data before processing
  • Configure firewalls or application gateways to reject unexpected image traffic from untrusted networks and monitor application logs for signs of excessive memory or CPU consumption indicative of exploitation attempts

Generated by OpenCVE AI on October 23, 2026 at 04:40 UTC.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4861-1 openjdk-17 security update
History

Fri, 23 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 22 Oct 2026 14:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770

Thu, 22 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Title Java SE ImageIO Partial Denial of Service via Malicious Network Input openjdk: Enhance GIF loading (Oracle CPU 2026-10)
Weaknesses CWE-835
References
Metrics threat_severity

None

 threat_severity

Moderate

Wed, 21 Oct 2026 19:00:00 +0000

Type Values Removed Values Added
First Time appeared Oracle oracle Java Se
Vendors & Products Oracle oracle Java Se

Wed, 21 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
Title Java SE ImageIO Partial Denial of Service via Malicious Network Input
Weaknesses CWE-770

Tue, 20 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Description 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).
First Time appeared Oracle
Oracle graalvm
Oracle graalvm For Jdk
Oracle java Se
Oracle javafx
CPEs cpe:2.3:a:oracle:graalvm:21.3.19.1.1:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:graalvm_for_jdk:17.0.20.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:graalvm_for_jdk:21.0.12.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:11.0.32.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:17.0.20.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:21.0.12.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:25.0.4.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:27:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:8u503:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:8u503:*:*:*:enterprise_performance:*:*:*
cpe:2.3:a:oracle:javafx:21.0.12:*:*:*:*:*:*:*
cpe:2.3:a:oracle:javafx:25.0.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:javafx:27:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle graalvm
Oracle graalvm For Jdk
Oracle java Se
Oracle javafx
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}

Subscriptions

Oracle Graalvm Graalvm For Jdk Java Se Javafx Oracle Java Se
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-10-22T18:50:23.261Z

Reserved: 2026-09-14T22:10:16.633Z

Link: CVE-2026-91418

cve-icon Vulnrichment

Updated: 2026-10-22T18:42:46.758Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:20:45.183

Modified: 2026-10-22T19:18:05.117

Link: CVE-2026-91418

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T21:25:51Z

Links: CVE-2026-91418 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T04:45:14Z

Weaknesses
  • CWE-400

    Uncontrolled Resource Consumption

  • CWE-835

    Loop with Unreachable Exit Condition ('Infinite Loop')