CVE WatchOct 22, 2026

CVE-2026-91451

Vulnerability in Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 11.0.3

CVSS

5.3

Medium

EPSS

0.3%

p20

KEV

—

Exploit Today

0-100

Published: Oct 20, 2026 · Last modified: Oct 22, 2026 · CWE-284

EPSS · 30d

0.3%EPSS · 30 days0.3%

2026-10-212026-10-25

Technical description

Vulnerability in 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; 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. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE accessible data. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 5.3 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N).

Official references

www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2026.html

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