The abrt-desktop subpackage (and probably others) in current F26 stable cannot be installed due to dependencies on hawkey (which has been removed). This means ABRT isn't present on any Fedora 26 Alpha images so far. See discussion at:
This is in fact already fixed by https://bodhi.fedoraproject.org/updates/FEDORA-2017-6f4667ac4d (abrt-2.10.1-1.fc26), but as we're in freeze, that update can't be pushed stable or go into composes without a freeze exception, so that's why I'm filing this bug.
Nominating as an Alpha FE, but in fact the update is quite a big change (it flips over from abrt-plugin-ccpp to abrt-journal-core by default, among other significant changes) and it may not be the best idea to pull it into a short-notice RC just in case it breaks anything else. If we wind up slipping another week (I hope not) it would probably be OK to pull it into the first post-slip RC as we'd have time to explore the consequences.
abrt-2.10.1-1.fc26 libreport-2.9.1-1.fc26 satyr-0.23-1.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-6f4667ac4d
(In reply to Adam Williamson from comment #0)
> Nominating as an Alpha FE, but in fact the update is quite a big change (it
> flips over from abrt-plugin-ccpp to abrt-journal-core by default, among
> other significant changes)
I already did this by modifying our systemd presets.
abrt-2.10.1-1.fc26, libreport-2.9.1-1.fc26, satyr-0.23-1.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.