Feed/CVE-2026-3433
CVE-2026-3433MEDIUMCVSS 4.3

CVE-2026-3433

Published Jun 12, 2026·Updated Aug 24, 2026

NVD 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 fail to restrict role_updated websocket event broadcasts to members of the affected team or channel which allows an authenticated attacker with guest-level access to observe permission scheme change notifications for private teams they are not a member of via the websocket connection.. Mattermost Advisory ID: MMSA-2026-00616

Affected Packages (2)

github.com/mattermost/mattermost-serverGO
Fixed in 11.6.1
github.com/mattermost/mattermost/server/v8GO
From 8.0.0-20250731163400-5b955468ea1e
Fixed in 8.0.0-20260504071740-9408b98025d7

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

View on NVD Search GitHub Search Google

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