Mattermost fails to enforce a limit for the size of the cache entry for OpenGraph data allowing an attacker to send a specially crafted request to the /api/v4/opengraph filling the cache and turning the server unavailable.
{
"versions": [
{
"introduced": "0"
},
{
"fixed": "7.8.11"
},
{
"introduced": "8.0.0"
},
{
"fixed": "8.0.3"
},
{
"introduced": "8.1.0"
},
{
"fixed": "8.1.2"
}
]
}