Announcing Istio 1.27.3

Istio 1.27.3 patch release.

Oct 20, 2025

This release contains bug fixes to improve robustness. This release note describes what’s different between Istio 1.27.2 and 1.27.3.

BEFORE YOU UPGRADE

Things to know and prepare before upgrading.

DOWNLOAD

Download and install this release.

DOCS

Visit the documentation for this release.

SOURCE CHANGES

Inspect the full set of source code changes.

Security Update

This release implements the security updates described in our 20th of October post, ISTIO-SECURITY-2025-002.

Changes

There are no other changes introduced in this release outside of the above mentioned security updates.