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Mattermost security vulnerabilities

🗓️ 22 May 2026 00:00:00Reported by China National Vulnerability Database of Information SecurityType 
cnnvd
 cnnvd
🔗 www.cnnvd.org.cn👁 37 Views

Mattermost versions up to 11.6.x, 11.5.x before 11.5.3, 11.4.x before 11.4.4, and 10.11.x before 10.11.14 leak team member data via application programming interface endpoints due to cleanup failure.

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-3636
22 May 202610:23
–attackerkb
bdu_fstec
BDU FSTEC
Mattermost Information Disclosure
1 Jul 202600:00
–bdu_fstec
circl
Circl
CVE-2026-3636
22 May 202612:53
–circl
cve
CVE
CVE-2026-3636
22 May 202610:23
–cve
cvelist
Cvelist
CVE-2026-3636 Sanitize team member data returned by API
22 May 202610:23
–cvelist
euvd
EUVD
EUVD-2026-31428
22 May 202610:23
–euvd
github
Github Security Blog
Mattermost doesn't sanitize team member data when returned via API to users without elevated permissions
26 May 202613:30
–github
mend
Mend
CVE-2026-3636
22 May 202610:23
–mend
nvd
NVD
CVE-2026-3636
22 May 202611:16
–nvd
osv_cve
osv_cve
CVE-2026-3636 Sanitize team member data returned by API
22 May 202610:23
–osv_cve
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02 Jun 2026 00:00Current
6.4Medium risk
Vulners AI Score6.4
CVSS 3.14.3
EPSS0.00184
SSVC
37