Go/github.com/mattermost/mattermost-server CVE-2026-26246: medium 4.3, EPSS 0.22%
Mattermost fails to bound memory allocation when processing PSD image files
Action: Upgrade github.com/mattermost/mattermost-server to 5.3.2-0.20260115183946-38b413a27604 or later.
go get github.com/mattermost/mattermost-server@v5.3.2-0.20260115183946-38b413a27604go get github.com/mattermost/mattermost-server@v10.11.11go get github.com/mattermost/mattermost-server@v11.2.3go get github.com/mattermost/mattermost-server@v11.3.1Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 5.3.2-0.20260115183946-38b413a27604 | - |
| 10.11.0-rc1 | 10.11.11 | - |
| 11.2.0-rc1 | 11.2.3 | - |
| 11.3.0-rc1 | 11.3.1 | - |
Fixed versions
| 5.3.2-0.20260115183946-38b413a27604 | 10.11.11 | 11.2.3 | 11.3.1 |
Sources
- osv: GHSA-44mv-jq72-gj49#Go/github.com/mattermost/mattermost-server
- https://nvd.nist.gov/vuln/detail/CVE-2026-26246
- https://github.com/mattermost/mattermost/commit/38b413a27604e8721fbe008f8ec4b4e6c47ad4f0
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2026-26246 · published · modified · JSON