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High severity8.8NVD Advisory· Published Jun 12, 2026· Updated Jun 15, 2026

CVE-2026-7387

CVE-2026-7387

Description

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Mattermost fails to require role-management authorization when setting the scheme_admin flag on group syncable link and patch endpoints, which allows a user with group-link permissions to escalate themselves and group members to team or channel admin via crafted API requests.. Mattermost Advisory ID: MMSA-2026-00665

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

1
  • Mattermost/Mattermostllm-fuzzy
    Range: >=11.6.0, <=11.6.1 || >=11.5.0, <=11.5.4 || >=10.11.0, <=10.11.16

Patches

Vulnerability mechanics

References

1

News mentions

1