ISSUE SUMMARY
During the release of version 2.6.1-rc0, packages were accidentally published into the MongoDB yum and apt repositories such that new and upgrade requests would install the release candidate 2.6.1-rc0 instead of 2.6.0 (stable release).

USER IMPACT
Users expecting to install, upgrade to, or retain version 2.6.0 may inadvertently install version 2.6.1-rc0, which is a release candidate and not recommended for production use. However, we do not expect that accidentally updating to 2.6.1-rc0 will adversely affect your data or operations.

How to check if this impacts you

By using the appropriate command for your package manager, you can check if you have installed the 2.6.1-rc0 package.

If you use the apt package manager, you are impacted if the following command returns any output:

dpkg -l mongodb-\* | grep 2.6.1

If you use the yum package manager, you are impacted if the following command returns any output:

rpm -qa | grep -i mongod | grep 2.6.1

WORKAROUNDS

If you find that you have the wrong package installed, please use the appropriate instructions for your package manager listed below:

For yum users:

sudo yum makecache
sudo yum downgrade mongodb-org-server-2.6.0-1 mongodb-org-2.6.0-1 mongodb-org-tools-2.6.0-1 mongodb-org-shell-2.6.0-1 mongodb-org-mongos-2.6.0-1

For apt users:

sudo apt-get update
sudo apt-get install mongodb-org=2.6.0 mongodb-org-server=2.6.0 mongodb-org-shell=2.6.0 mongodb-org-mongos=2.6.0 mongodb-org-tools=2.6.0

RESOLUTION
The 2.6.1-rc0 packages were removed and package metadata updated.

AFFECTED VERSIONS
The packages were incorrectly published on April 22, 5:30pm EDT. The issue was resolved on April 23, 11:30AM EDT. Users who intended to install or upgrade to version 2.6.0 during this time were affected by this issue.