CVE-2026-16044

EPSS 0.17%
Veröffentlicht 17.08.2026 14:26:52
Zuletzt bearbeitet 18.08.2026 20:27:55
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Insufficient validation of guest board admin privileges on archive import

Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to prevent guest users from receiving Board Admin privileges during board archive import which allows a board member to escalate a guest user to Board Admin via importing a crafted .boardarchive file. Mattermost Advisory ID: MMSA-2026-00672

Betroffene Produkte Warnungen 0 Metriken 2 CWE 1 Referenzen 4

NVD 2 VulnDex Vulnerability Enrichment 1

Daten sind bereitgestellt durch National Vulnerability Database (NVD)

Mattermost ≫ Mattermost Server Version >= 10.11.0 < 10.11.22

Mattermost ≫ Mattermost Server Version >= 11.7.0 < 11.7.7

VulnDex Vulnerability Enrichment

Diese Information steht angemeldeten Benutzern zur Verfügung.

Zu dieser CVE wurde keine Warnung gefunden.

EPSS Metriken
Typ	Quelle	Score	Percentile
EPSS	FIRST.org	0.17%	0.067

CVSS Metriken
Quelle	Base Score	Exploit Score	Impact Score	Vector String
responsibledisclosure@mattermost.com	5.4	2.8	2.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

CWE-863 Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

https://mattermost.com/security-updates

Vendor Advisory

https://nvd.nist.gov/vuln/detail/CVE-2026-16044

CVE Source (NVD)

https://cveawg.mitre.org/api/cve/CVE-2026-16044

CVE Source (JSON)

https://euvd.enisa.europa.eu/vulnerability/CVE-2026-16044

EUVD

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CVE-2026-16044