macOS Mojave 10.14.3
This update improves the security, stability, and compatibility of your Mac and includes the following enterprise content: When making a file-sharing connection that uses a valid Kerberos TGT to authenticate, users are no longer prompted to enter credentials."

Here's the article about the security content of macOS Mojave 10.14.3, Security Update 2019-001 High Sierra, and Security Update 2019-001 Sierra.

Also released is Safari 12.0.3 with security fixes for Webkit and Safari Reader. (For macOS Sierra 10.12.6, macOS High Sierra 10.13.6, and macOS Mojave 10.14.3.)

Downloads of the Updates: (file sizes on D/L pages may not be accurate)
(FYI: Download pages for 10.14.3 delta and Combo updates are now dated Feb. 7th,
the same date that the 10.14.3 Supplemental Update (build 18D109) was released.
So the Supplemental Update (Group FaceTime fix) may now be included in these downloads.)

• Download macOS Mojave 10.14.3 Update (was 1.99 GB)
  (Feb. 7th revised download said to be 1.86 GB now.)
  
  
• Download macOS Mojave 10.14.3 Combo Update (was 2.49 GB)
  (* Jan. 28th post said there's a revised Combo Update that's now 2.51 GB
  with installer pkg dated Jan. 24th to fix problem of updating 10.14.2.
  The Feb. 7th revised download is likely a different size again however.)
  
  
• Download Security Update 2019-001 (High Sierra) (1.83 GB)
  
  
• Download Security Update 2019-001 (Sierra) (832.9 MB)

FYI on Nvidia Web Driver Updates:
(There's been no Mojave Nvidia web driver updates yet, but a reminder to 10.13.6/10.12.6 users of Nvidia's web graphics drivers.) New OS updates or later build numbers after Security Updates typically break currently installed Nvidia web graphics drivers. I'd switch to the default Apple driver and reboot before updating, if your card is supported with the default drivers. If not, wait for a Nvidia driver update. (Some non-Mac EFI cards are not supported by default OS X drivers.)
As always, I post download pages for Nvidia web graphics driver updates in the news, and on the video topics page when spotted.

Update - New Nvidia Graphics Drivers
- See Nvidia web Graphics driver updates for MacOS 10.13.6 and 10.12.6 builds with Security Update 2019-001 in the Jan. 25, 2019 News archive, or the Video topics page.

• iOS 12.1.3 Release notes (includes fixes for HomePod)
• About the security content of iOS 12.1.3
  
  
• tvOS 12.1.2 release notes
  (simply says "This update includes general performance and stability improvements.")
• About the security content of tvOS 12.1.2
  
  
• watchOS 5.1.3 release notes
  (simply says "This update includes improvements and bug fixes.")
• About the security content of watchOS 5.1.3