NSS 3.126.1 release notes

Introduction

Network Security Services (NSS) 3.126.1 was released on 13 August 2026.

Distribution Information

The HG tag is NSS_3_126_1_RTM. NSS 3.126.1 requires NSPR 4.39 or newer.

NSS 3.126.1 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_126_1_RTM/src/

Other releases are available Release Notes.

Changes in NSS 3.126.1

• Bug 2054719 - fix content type tag for CMS AuthEnvelopedData plaintext.