NSS 3.120 Release

[Dennis Jackson]

Network Security Services (NSS) 3.120 was released on 8 January 2026.

The HG tag is NSS_3_120_RTM. This version of NSS requires NSPR 4.38 or newer. The latest version of NSPR is 4.38.2.

NSS 3.120 source distributions are available on ftp.mozilla.org for secure HTTPS download:
<https://ftp.mozilla.org/pub/security/nss/releases/NSS_3_120_RTM/src/>

Changes:

   - Bug 2008768 - Fix docs generation bug.
   - Bug 2007908 - CID 1678226: Dereferencing null pointer plaintext.data().
   - Bug 2004694 - Run PKCS12 fuzz target with --fuzz=tls in CI.
   - Bug 1978603 - Allowing RT be started several times.
   - Bug 2005751 - move linux decision and build tasks to d2g worker pools.

NSS 3.119 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>.