JDK 8u503 Release Notes
Java™ SE Development Kit 8, Update 8u503 (JDK 8u503)
Release date: August 18, 2026
The full version string for this update release is 1.8.0_503-b01 (where "b" means "build"). The version number is 8u503. This JDK conforms to version 8.6 of the Java SE Specification (JSR 337 MR 6 2024-07-02).
IANA TZ Data 2026b
For more information, refer to Timezone Data Versions in the JRE Software.
Security Baselines
The security baselines for the Java Runtime Environment (JRE) at the time of the release of JDK 8u503 are specified in the following table:
| JRE Family Version | JRE Security Baseline (Full Version String) |
|---|---|
| 8 | 1.8.0_503-b01 |
Keeping the JDK up to Date
Oracle recommends that the JDK is updated with each Critical Patch Update. In order to determine if a release is the latest, the Security Baseline page can be used to determine which is the latest version for each release family.
Critical patch updates, which contain security vulnerability fixes, are announced one year in advance on Critical Patch Updates, Security Alerts and Bulletins. It is not recommended that this JDK (version 8u503) be used after the next critical patch update scheduled for October 20, 2026.
Java Management Service, available to all users, can help you find vulnerable Java versions in your systems. Java SE Subscribers and customers running in Oracle Cloud can use Java Management Service to update Java Runtimes and to do further security reviews like identifying potentially vulnerable third party libraries used by your Java programs. Existing Java Management Service user click here to log in to your dashboard. The Java Management Service Documentation provides a list of features available to everyone and those available only to customers. Learn more about using Java Management Service to monitor and secure your Java Installations.
For systems unable to reach the Oracle Servers, a secondary mechanism expires this JRE (version 8u503) on 2026-11-20. After either condition is met (new release becoming available or expiration date reached), the JRE will provide additional warnings and reminders to users to update to the newer version. For more information, see 23.1.2 JRE Expiration Date in the Java Platform, Standard Edition Deployment Guide.
Fixes
This release contains fixes for security vulnerabilities described in the Oracle Critical Patch Update.