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PT-2026-76661

🗓️ 17 Aug 2026 00:00:00Reported by Positive TechnologiesType 
ptsecurity
 ptsecurity
🔗 dbugs.ptsecurity.com👁 5 Views

Mattermost versions up to 11.8.3 allow authenticated attackers to discover private channel memberships via arbitrary board channelId linking.

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-16047
17 Aug 202614:25
attackerkb
cve
CVE
CVE-2026-16047
17 Aug 202614:25
cve
cvelist
Cvelist
CVE-2026-16047 Board channel linking without read channel permission validation
17 Aug 202614:25
cvelist
euvd
EUVD
EUVD-2026-60208
17 Aug 202614:25
euvd
nvd
NVD
CVE-2026-16047
17 Aug 202615:16
nvd
vulnrichment
Vulnrichment
CVE-2026-16047 Board channel linking without read channel permission validation
17 Aug 202614:25
vulnrichment

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17 Aug 2026 00:00Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.14.3
5