High severity8.0NVD Advisory· Published Mar 26, 2026· Updated Jun 17, 2026
CVE-2026-3108
CVE-2026-3108
Description
Mattermost versions 11.2.x <= 11.2.2, 10.11.x <= 10.11.10, 11.4.x <= 11.4.0, 11.3.x <= 11.3.1 fail to sanitize user-controlled post content in the mmctl commands terminal output which allows attackers to manipulate administrator terminals via crafted messages containing ANSI and OSC escape sequences that enable screen manipulation, fake prompts, and clipboard hijacking.. Mattermost Advisory ID: MMSA-2026-00599
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/mattermost/mattermost/server/v8Go | >= 11.4.0-rc1, < 11.4.1 | 11.4.1 |
github.com/mattermost/mattermost/server/v8Go | >= 11.3.0-rc1, < 11.3.2 | 11.3.2 |
github.com/mattermost/mattermost/server/v8Go | >= 11.2.0-rc1, < 11.2.3 | 11.2.3 |
github.com/mattermost/mattermost/server/v8Go | >= 10.11.0-rc1, < 10.11.11 | 10.11.11 |
github.com/mattermost/mattermost/server/v8Go | >= 8.0.0-20260105080200-d27a2195068d, < 8.0.0-20260217110922-b7d4a1f1f59b | 8.0.0-20260217110922-b7d4a1f1f59b |
Affected products
5cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: >=10.11.0,<10.11.11
- cpe:2.3:a:mattermost:mattermost_server:11.4.0:*:*:*:*:*:*:*
- (no CPE)range: 11.2.0
- ghsa-coords2 versionspkg:golang/github.com/mattermost/mattermost/server/v8pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
>= 11.4.0-rc1, < 11.4.1+ 1 more
- (no CPE)range: >= 11.4.0-rc1, < 11.4.1
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-3439-vqgj-2gcfghsaADVISORY
- mattermost.com/security-updatesnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-3108ghsaADVISORY
News mentions
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