The vulnerability of the Mattermost instant messaging application, related to information disclosure, allows a malicious actor to gain unauthorized access to protected information.
🗓️ 01 Jul 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 25 Views
| Reporter | Title | Published | Views | Family All 20 |
|---|---|---|---|---|
 | CVE-2026-3636 | 22 May 202610:23 | – | attackerkb |
 | CVE-2026-3636 | 22 May 202612:53 | – | circl |
 | Mattermost 安全漏洞 | 22 May 202600:00 | – | cnnvd |
 | CVE-2026-3636 | 22 May 202610:23 | – | cve |
 | CVE-2026-3636 Sanitize team member data returned by API | 22 May 202610:23 | – | cvelist |
 | EUVD-2026-31428 | 22 May 202610:23 | – | euvd |
 | Mattermost doesn't sanitize team member data when returned via API to users without elevated permissions | 26 May 202613:30 | – | github |
 | CVE-2026-3636 | 22 May 202610:23 | – | mend |
 | CVE-2026-3636 | 22 May 202611:16 | – | nvd |
 | GHSA-FFPR-PFR4-G354 Mattermost doesn't sanitize team member data when returned via API to users without elevated permissions | 26 May 202613:30 | – | osv |
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Node
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| Source | Link |
|---|---|
| mattermost | www.mattermost.com/security-updates |
| web | www.web.nvd.nist.gov/view/vuln/detail |
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01 Jul 2026 00:00Current
8.2High risk
Vulners AI Score8.2
CVSS 24
CVSS 34.3
EPSS0.00301