CVE-2026-6347
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to sanitize sensitive configuration fields in the Mattermost Calls plugin which allows an attacker with access to a support packet to obtain TURN server credentials via the plaintext values present in the exported plugin configuration.. Mattermost Advisory ID: MMSA-2026-00605
- CVSS 3.1
- 7.6
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:L - EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 18% of CVEs (scores of 2026-10-25)
- CWE
- CWE-200
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-82j6-4fq7-fx62 | Go | github.com/mattermost/mattermost-server | >=11.5.0 <11.5.2 | 11.5.2 |
| GHSA-82j6-4fq7-fx62 | Go | github.com/mattermost/mattermost-server | >=10.11.0 <10.11.14 | 10.11.14 |
| GHSA-82j6-4fq7-fx62 | Go | github.com/mattermost/mattermost-server | >=11.4.0 <11.4.4 | 11.4.4 |
| GHSA-82j6-4fq7-fx62 | Go | github.com/mattermost/mattermost-plugin-calls | <1.12.0-rc2 | 1.12.0-rc2 |
| GO-2026-5238 | Go | github.com/mattermost/mattermost-plugin-calls | <1.12.0-rc2 | 1.12.0-rc2 |
| GO-2026-5238 | Go | github.com/mattermost/mattermost-server | >=10.11.0+incompatible <10.11.14+incompatible >=11.4.0+incompatible <11.4.4+incompatible >=11.5.0+incompatible <11.5.2+incompatible | 10.11.14+incompatible, 11.4.4+incompatible, 11.5.2+incompatible |