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CVE-2026-9693

🗓️ 17 Aug 2026 23:16:52Reported by [email protected]Type 
nvd
 nvd
🔗 web.nvd.nist.gov👁 23 Views

Mattermost fails to remove thread membership on team removal, allowing re-invited users to view private channel threads.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-9693
17 Aug 202622:07
–attackerkb
cve
CVE
CVE-2026-9693
17 Aug 202622:07
–cve
cvelist
Cvelist
CVE-2026-9693 Mattermost thread memberships persist after team removal, exposing private channel thread metadata on re-invite
17 Aug 202622:07
–cvelist
euvd
EUVD
EUVD-2026-60542
18 Aug 202600:30
–euvd
mend
Mend
CVE-2026-9693
17 Aug 202622:07
–mend
ncsc
NCSC
Vulnerabilities in Mattermost
19 Aug 202606:34
–ncsc
osv_mini
osv_mini
MINI-8R5Q-GF4G-XVMW
20 Aug 202613:47
–osv_mini
osv_mini
osv_mini
MINI-V74C-X4CR-8XRP
20 Aug 202613:47
–osv_mini
ptsecurity
Positive Technologies
PT-2026-76875
17 Aug 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-9693: Incomplete Cleanup
17 Aug 202600:00
–rapid7
Rows per page
NVD
Node
OR
mattermostmattermost_serverRange10.11.0–10.11.21
mattermostmattermost_serverRange11.7.0–11.7.6

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19 Aug 2026 13:14Current
CVSS 3.13.5
EPSS0.00271
SSVC
23