Description
An issue was discovered in Mattermost Server before 3.0.2. The purposes of a session ID and a Session Token were mishandled.
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 Tumbleweed | govulncheck-vulndb | 0.0.20251105T184115-1.1 | openSUSE-SU-2025:15710-1 |
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | < 3.0.2 | 3.0.2 | GHSA-43m6-wvc8-2m7j |
| Go | github.com/mattermost/mattermost-server | < 3.0.2+incompatible | 3.0.2+incompatible | GO-2025-4055 |
Advisories 2
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026
- openSUSE-SU-2025:15710-1 govulncheck-vulndb-0.0.20251105T184115-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026