Description
An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7. After a restart of a server, an attacker might suddenly gain API Endpoint access.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
| openSUSE Leap 15.6 | govulncheck-vulndb | 0.0.20260226T182644-150000.1.149.1 | SUSE-SU-2026:0757-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | < 3.6.7-0.20170420152529-0968e4079e0a | 3.6.7-0.20170420152529-0968e4079e0a | GHSA-hxxj-8phw-74vw |
| Go | github.com/mattermost/mattermost-server | >= 3.7.0, < 3.7.5 | 3.7.5 | GHSA-hxxj-8phw-74vw |
| Go | github.com/mattermost/mattermost-server | >= 3.8.0, < 3.8.2 | 3.8.2 | GHSA-hxxj-8phw-74vw |
| Go | github.com/mattermost/mattermost-server | >= 3.7.0+incompatible, < 3.7.5+incompatible · >= 3.8.0+incompatible, < 3.8.2+incompatible | 3.7.5+incompatible, 3.8.2+incompatible | GO-2026-4462 |
Advisories 2
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026
- SUSE-SU-2026:0757-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Mar 4, 2026