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The vulnerability of the Mattermost instant messaging application, related to access control errors, allows a malicious user to reduce the privileges of arbitrary users.
🗓️ 13 May 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 1 Views
| Reporter | Title | Published | Views | Family All 11 |
|---|---|---|---|---|
 | CVE-2026-26230 | 16 Mar 202620:19 | – | attackerkb |
 | Mattermost 安全漏洞 | 16 Mar 202600:00 | – | cnnvd |
 | CVE-2026-26230 | 16 Mar 202620:19 | – | cve |
 | CVE-2026-26230 Team Admin Privilege Escalation to Demote Members to Guest | 16 Mar 202620:19 | – | cvelist |
 | EUVD-2026-12518 | 16 Mar 202621:34 | – | euvd |
 | CVE-2026-26230 | 16 Mar 202621:16 | – | nvd |
 | PT-2026-25813 | 16 Mar 202600:00 | – | ptsecurity |
 | CVE-2026-26230 | 16 Mar 202622:19 | – | redhatcve |
 | Incorrect Authorization | 16 Mar 202622:46 | – | snyk |
| Incorrect Authorization | 16 Mar 202622:46 | – | snyk |
10
Node
| Source | Link |
|---|---|
| mattermost | www.mattermost.com/security-updates |
| web | www.web.nvd.nist.gov/view/vuln/detail |
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13 May 2026 00:00Current
5.9Medium risk
Vulners AI Score5.9
CVSS 33.8
CVSS 25.5
EPSS0.00159