MEDIUM 4.3 NVD

CVE-2026-14259

Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to enforce board creation permissions when importing archive

Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to enforce board creation permissions when importing archive files which allows an authenticated non-guest team member to create Open or Private boards despite administrator restrictions via importing a crafted .boardarchive file. Mattermost Advisory ID: MMSA-2026-00712

References

https://mattermost.com/security-updates

Published: 2026-09-14 · Source: NVD · Feed updated: 2026-09-15

This medium severity vulnerability with a CVSS score of 4.3 was published on 2026-09-14 via NVD.

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