NSS 3.51.1 release notes


The NSS team has released Network Security Services (NSS) 3.51.1 on 3 April 2020. This is a minor release focusing on functional bug fixes and low-risk patches only.

Distribution Information

The HG tag is NSS_3_51_1_RTM. NSS 3.51.1 requires NSPR 4.25 or newer.

NSS 3.51.1 source distributions are available on ftp.mozilla.org for secure HTTPS download:

Other releases are available Release notes for recent versions of NSS.

Notable Changes in NSS 3.51.1

  • Bug 1617968 - Update Delegated Credentials implementation to draft-07.

Bugs fixed in NSS 3.51.1

  • Bug 1619102 - Add workaround option to include both DTLS and TLS versions in DTLS supported_versions.

  • Bug 1619056 - Update README: TLS 1.3 is not experimental anymore.

  • Bug 1618739 - Don’t assert fuzzer behavior in SSL_ParseSessionTicket.

  • Bug 1618915 - Fix UBSAN issue in ssl_ParseSessionTicket.

  • Bug 1608245 - Consistently handle NULL slot/session.

  • Bug 1608250 - broken fipstest handling of KI_len.

  • Bug 1617968 - Update Delegated Credentials implementation to draft-07.


NSS 3.51.1 shared libraries are backward compatible with all older NSS 3.x shared libraries. A program linked with older NSS 3.x shared libraries will work with NSS 3.51.1 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 with bugzilla.mozilla.org (product NSS).