NSS 3.126.1 Release

[John Schanck]

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



The HG tag is NSS_3_126_1_RTM. This version of NSS requires NSPR 4.39
or newer. The latest version of NSPR is 4.39.

NSS 3.126.1 source distributions are available on ftp.mozilla.org for
secure HTTPS download:

<https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_126_1_RTM/src/>

Changes:

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

NSS 3.126.1 shared libraries are backwards-compatible with all older
NSS 3.x shared libraries. A program linked with older NSS 3.x shared
libraries will work with this new version of the shared libraries
without recompiling or relinking. Furthermore, applications that
restrict their use of NSS APIs to the functions listed in NSS Public
Functions will remain compatible with future versions of the NSS
shared libraries.

Bugs discovered should be reported by filing a bug report at
<https://bugzilla.mozilla.org/enter_bug.cgi?product=NSS>

Release notes are available at
<https://firefox-source-docs.mozilla.org/security/nss/releases/index.html>.