Go/github.com/mattermost/mattermost-server/v6 CVE-2026-2455: unknown, EPSS 0.17%
Mattermost fails to canonicalize IPv4-mapped IPv6 addresses before reserved IP validation in github.com/mattermost/mattermost-server
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | - |
Fixed versions
No fixed version in the source.
Sources
- osv: GO-2026-4746#Go/github.com/mattermost/mattermost-server/v6
- https://github.com/advisories/GHSA-gqv7-j2j8-qmwq
- https://nvd.nist.gov/vuln/detail/CVE-2026-2455
- https://github.com/mattermost/mattermost/commit/5d787969c2d5ab591a9dcd61b0810475eed7a646
- https://mattermost.com/security-updates
CVE-2026-2455 · published · modified · JSON