VDB
GO-2026-4282
GO-2026-4282
PUBLISHED
CVSS 9.300000190734863 CRITICAL
Mattermost Server is vulnerable to channel invisibility DoS via misformatted post in github.com/mattermost/mattermost-server
Risk Scores
CVSS 4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| github.com | mattermost/mattermost-server | 4.2.0+incompatible, 4.3.0-rc1+incompatible, 0 |
Timeline
- Feb 26, 2026 CVE Published
- Feb 26, 2026 CVE Updated
- May 1, 2026 Security Advisory
References
- https://github.com/advisories/GHSA-x6mw-hf2j-vqpc advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-18873 advisory
- https://mattermost.com/security-updates url
- https://github.com/mattermost/mattermost/commit/9adaf53e110e0e806b21903111aacb93129668cb fix
- https://github.com/mattermost/mattermost/commit/b3e4b0ac91682093276a653f7ccd5774aaa9cd06 fix
- https://github.com/mattermost/mattermost/commit/ee57a5829ab162859e0e355dac6cfe6ca1a8f379 fix