VDB
GO-2026-4296
GO-2026-4296
PUBLISHED
CVSS 9.300000190734863 CRITICAL
Mattermost Server is vulnerable to XSS through display name field in github.com/mattermost/mattermost-server
Risk Scores
CVSS v4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/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-887v-xh2x-47cm advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-18893 advisory
- https://github.com/mattermost/mattermost/commit/2a4d88d07c5815deac103e109550d25338507151 url
- https://github.com/mattermost/mattermost/commit/670bfbf62686ebe9f2ab332733d851a62b6950b0 url
- https://github.com/mattermost/mattermost/commit/d0b42b9e527e93a61fd06a9b9106fc97067807e4 url
- https://mattermost.com/security-updates url