Go/github.com/mattermost/mattermost/server/v8 CVE-2026-6961: high 7.6, EPSS 0.30%
Mattermost doesn't sanitize FileInfo.Name received from federated peers during shared channel file sync
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260423180926-c021eeaff8f0 or later.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20260423180926-c021eeaff8f0Affected
| introduced | fixed | last affected |
|---|---|---|
| 8.0.0-20250731163400-5b955468ea1e | 8.0.0-20260423180926-c021eeaff8f0 | - |
Fixed versions
| 8.0.0-20260423180926-c021eeaff8f0 |
Sources
- osv: GHSA-8qq9-cqj8-82w4#Go/github.com/mattermost/mattermost/server/v8
- https://nvd.nist.gov/vuln/detail/CVE-2026-6961
- https://github.com/mattermost/mattermost/pull/36255
- https://github.com/mattermost/mattermost/pull/36253
- https://github.com/mattermost/mattermost/pull/36252
- https://github.com/mattermost/mattermost/pull/36251
- https://github.com/mattermost/mattermost/pull/36223
- https://github.com/mattermost/mattermost/commit/c896a63dc44c2f9c081a0a15bfddc4e6eb50e753
- https://github.com/mattermost/mattermost/commit/c021eeaff8f003034ab40f82c552cc26a710a8fd
- https://github.com/mattermost/mattermost/commit/a9f3868e1eee9ec61855cd7277f39937385efffd
- https://github.com/mattermost/mattermost/commit/a0056ed68d95f64d7c4586985e7b7f16b96b3bec
- https://github.com/mattermost/mattermost/commit/61d68d2d6ee81a5919597d91c736c502d7156859
- https://github.com/mattermost/mattermost/releases/tag/v10.11.16
- https://github.com/mattermost/mattermost/releases/tag/v11.5.5
- https://github.com/mattermost/mattermost/releases/tag/v11.6.2
- https://github.com/mattermost/mattermost/releases/tag/v11.7.0
- https://mattermost.com/security-updates
- https://github.com/mattermost/mattermost
CVE-2026-6961 · published · modified · JSON