Brave-browser: Ubuntu/Debian repository broken

[scmart]

Getting the following when attempting to update.

Err:8 https://brave-browser-apt-release.s3.brave.com xenial InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 0B31DBA06A8A26F9

[BallisticBuddha]

I've started to see this today, too (on Ubuntu bionic). I even tried re-running the key import with:
curl https://s3-us-west-2.amazonaws.com/brave-apt/keys.asc | sudo apt-key add -
but I'm still unable to update the package list due to a missing public key.

[bluz71]

At the command line try this:

curl -s https://brave-browser-apt-release.s3.brave.com/brave-core.asc | sudo apt-key add -

That seems to have fixed the issue for me.

[2bithacker]

I was having the same problem, the command in https://github.com/brave/brave-browser/issues/2405#issuecomment-445494542 fixed it for me. Thanks!

[tomlowenthal]

Looks like you're seeing this issue: https://github.com/brave/brave-browser/issues/1826#issuecomment-445948353 .