VDB
GO-2026-4300
GO-2026-4300
PUBLISHED
CVSS 8.699999809265137 HIGH
Mattermost Server is vulnerable to DoS through maliciously crafted posts in github.com/mattermost/mattermost-server
Risk Scores
CVSS 4.0
8.699999809265137
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| github.com | mattermost/mattermost-server | 0, 4.1.0+incompatible, 4.2.0-rc1+incompatible |
Timeline
- Jan 13, 2026 CVE Published
- Mar 3, 2026 CVE Updated
- May 1, 2026 Security Advisory
References
- https://github.com/advisories/GHSA-9589-mq83-f749 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-18898 advisory
- https://mattermost.com/security-updates url
- https://github.com/grundleborg/mattermost/commit/5286318c72aa230f33f89df3b4cbdc33a0822a93 fix
- https://github.com/mattermost/mattermost/commit/5bf6f06c02c368b9c73a8be2d2d8795b3405b22b fix
- https://github.com/mattermost/mattermost/commit/5c22176c963a7393241872073547f30083efe218 fix