# JDK 27 Security Enhancements

DevFeed: [JDK 27 Security Enhancements](<https://devfeed.tech/articles/jdk-27-security-enhancements-27007.md>)

Original publisher: [Read original article](<https://inside.java/2026/09/16/jdk27-security-enhancements/>)

Author: Sean Mullan

Published: 2026-09-16T00:00:00Z

Content type: article

Language: en

Sources: [Inside Java](<https://devfeed.tech/sources/inside-java.md>)

Topics: [JDK 27](<https://devfeed.tech/topics/jdk-27.md>), [Security](<https://devfeed.tech/topics/security.md>), [Cryptography](<https://devfeed.tech/topics/cryptography.md>), [Encryption](<https://devfeed.tech/topics/encryption.md>), [TLS (Transport Layer Security)](<https://devfeed.tech/topics/tls.md>), [Post-Quantum](<https://devfeed.tech/topics/post-quantum.md>), [Release notes](<https://devfeed.tech/topics/release-notes.md>)

Tags: [certificates](<https://devfeed.tech/tags/certificates.md>), [cryptographic](<https://devfeed.tech/tags/cryptographic.md>), [encryption](<https://devfeed.tech/tags/encryption.md>), [jdk-27](<https://devfeed.tech/tags/jdk-27.md>), [notes](<https://devfeed.tech/tags/notes.md>), [password](<https://devfeed.tech/tags/password.md>), [post-quantum](<https://devfeed.tech/tags/post-quantum.md>), [private-key](<https://devfeed.tech/tags/private-key.md>), [release-notes](<https://devfeed.tech/tags/release-notes.md>), [security](<https://devfeed.tech/tags/security.md>), [tls](<https://devfeed.tech/tags/tls.md>)

## AI overview

This article reviews selected security enhancements in JDK 27, released on September 15, 2026. It highlights TLS 1.3 support for post-quantum hybrid key exchange mechanisms and the third preview of the PEM API for encoding and decoding cryptographic objects.

## Source excerpt

JDK 27 was released on September 15, 2026! As with my previous blogs, I have compiled a list of what I think are the most interesting and useful security enhancements in this release. I have also grouped them into appropriate categories (crypto, TLS, etc) which should make it easier to find out what has changed in each specific area. The JDK 27 release notes also contain further details on these and other enhancements.