NSS 3.123.1 release notes

Introduction 

Network Security Services (NSS) 3.123.1 was released on 23 April 2026.

Distribution Information 

The HG tag is NSS_3_123_1_RTM. NSS 3.123.1 requires NSPR 4.38.2 or newer.

NSS 3.123.1 source distributions are available on ftp.mozilla.org for secure HTTPS download:

Source tarballs: https://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/NSS_3_123_1_RTM/src/

Other releases are available Release Notes.

Changes in NSS 3.123.1 

Bug 2033783 - reject DTLS 1.3 Server Hello after HVR without capping ss->vrange.max.