4.3

CVE-2026-3433

Mattermost fails to scope role_updated websocket events to authorized team and channel members

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
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerMattermost
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Produkt Mattermost
Default Statusunaffected
Version <= 11.6.1
Version 11.6.0
Status affected
Version <= 11.5.4
Version 11.5.0
Status affected
Version <= 10.11.15
Version 10.11.0
Status affected
Version <= 10.11.16
Version 10.11.0
Status affected
Version 11.7.0
Status unaffected
Version 11.6.2
Status unaffected
Version 11.5.5
Status unaffected
Version 10.11.16
Status unaffected
Version 10.11.17
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.18% 0.077
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
responsibledisclosure@mattermost.com 4.3 2.8 1.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

https://mattermost.com/security-updates