Mattermost makes Use of Weak Hash in github.com/mattermost/mattermost-server
Mattermost makes Use of Weak Hash in github.com/mattermost/mattermost-server
02 / AFFECTED SOFTWARE
Affected packages
99 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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
Mattermost makes Use of Weak Hash in github.com/mattermost/mattermost-server
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.
05 / REFERENCES
Further evidence
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/9xxx/CVE-2025-9078.json
- https://mattermost.com/security-updates
- https://nvd.nist.gov/vuln/detail/CVE-2025-9078
- https://github.com/advisories/GHSA-9p92-x77w-9fw2
- https://github.com/mattermost/mattermost/commit/356880c8430b77a4a390c89d5a33f6928188d137
- https://github.com/mattermost/mattermost/commit/944ad5cdd9876ef61c78c8275906262a4118755a
- https://github.com/mattermost/mattermost/commit/a8a4badc130be101e5bc4b7916bbcd2f966c4b79
- https://github.com/mattermost/mattermost/commit/cd87e5c877373f109742aa90a3fa136c14774325
- https://github.com/mattermost/mattermost