CVE-2025-9078 Weak cache keys lead to post IDOR and link preview poisoning

Mattermost versions 10.8.x = 10.8.3, 10.5.x = 10.5.8, 9.11.x = 9.11.17, 10.10.x = 10.10.1, 10.9.x = 10.9.3 fail to properly validate cache keys for link metadata which allows authenticated users to access unauthorized posts and poison link previews via hash collision attacks on FNV-1 hashing...

CVE-2025-9078 Weak cache keys lead to post IDOR and link preview poisoning

Mattermost versions 10.8.x = 10.8.3, 10.5.x = 10.5.8, 9.11.x = 9.11.17, 10.10.x = 10.10.1, 10.9.x = 10.9.3 fail to properly validate cache keys for link metadata which allows authenticated users to access unauthorized posts and poison link previews via hash collision attacks on FNV-1 hashing...