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Vulnerability

CVE-2026-91398

Integrity flaw in Oracle Java SE Networking via SOCKS5

CVSS 3.1
6.8 medium
EPSS
—
Published
·
Modified
Analyze CVE-2026-91398 with Vani AIImpact, affected versions, exploitation status, mitigations and detection
AI analysisSummaries by Vani AI

A flaw in the Networking component of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition lets an unauthenticated attacker with network access via SOCKS5 create, delete, or modify critical accessible data. Exploitation is difficult and needs no user interaction; it can also be triggered through APIs fed by a web service, and in sandboxed Java Web Start or applet clients that run untrusted code. Scope change means other products may be affected.

What to do: Apply Oracle's update for CVE-2026-91398. Oracle has not listed fixed versions.

ProductAffected
Oracle Java SE8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27
Oracle GraalVM for JDK17.0.20.1 and 21.0.12.1
Oracle GraalVM Enterprise Edition21.3.19.1.1
Estimated exposure
No basis for an estimate.

Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.

Description · NVD

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). 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 SOCKS5 to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. While the vulnerability is in Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all 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 6.8 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N).

Weakness
CWE-284
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
NVD CVE.org GitHub PoCs EPSS (—)

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