https://mojang.com/2015/06/minecraft-1-8-7-security-release/
We have released a new version of Minecraft 1.8, 1.8.7, which is now
available for download in your launcher. This release fixes a few reported
security issues.
This version is fully compatible with all previous 1.8 versions, but it is
still highly recommend to update to 1.8.7 as soon as possible for both
players and servers.
Notable fixes:
[Bug MC-80749] – Resource packs do not get cleaned up
[Bug MC-80750] – Resource packs continue downloading after disconnect
[Bug MC-80875] – Specific unicode character pair crashes tr_TR clients
[Bug MC-81001] – Signs can cause crashes