The vulnerability of the Mattermost instant messaging application, related to access control errors, allows a hacker to execute arbitrary code.
🗓️ 13 May 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 9 Views
| Reporter | Title | Published | Views | Family All 16 |
|---|---|---|---|---|
 | Mattermost 安全漏洞 | 16 Mar 202600:00 | – | cnnvd |
 | CVE-2026-26304 | 16 Mar 202619:53 | – | cve |
 | CVE-2026-26304 Permission Bypass in Playbook Run Creation | 16 Mar 202619:53 | – | cvelist |
 | EUVD-2026-12512 | 16 Mar 202621:34 | – | euvd |
 | Mattermost fails to verify run_create permission for empty playbookId | 16 Mar 202621:34 | – | github |
 | CVE-2026-26304 | 16 Mar 202620:16 | – | nvd |
 | GHSA-4PMX-622H-X359 Mattermost fails to verify run_create permission for empty playbookId | 16 Mar 202621:34 | – | osv |
| GO-2026-4812 Mattermost fails to verify run_create permission for empty playbookId in github.com/mattermost/mattermost-plugin-playbooks | 23 Mar 202618:16 | – | osv |
| OPENSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb | 30 Jul 202609:09 | – | osv |
| SUSE-SU-2026:1135-1 Security update for govulncheck-vulndb | 27 Mar 202617:33 | – | osv |
10
Node
OR
| 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
6Medium risk
Vulners AI Score6
CVSS 24
CVSS 34.3
EPSS0.00159