Mattermost security vulnerabilities
🗓️ 16 Mar 2026 00:00:00Reported by China National Vulnerability Database of Information SecurityType 
cnnvd🔗 www.cnnvd.org.cn👁 25 Views
| Reporter | Title | Published | Views | Family All 20 |
|---|---|---|---|---|
 | CVE-2026-4265 | 16 Mar 202612:07 | – | attackerkb |
 | Mattermost Authentication Bypass File Upload | 13 May 202600:00 | – | bdu_fstec |
 | CVE-2026-4265 | 17 Mar 202600:00 | – | circl |
 | CVE-2026-4265 | 16 Mar 202612:07 | – | cve |
 | CVE-2026-4265 Guest user can upload files without permission across teams | 16 Mar 202612:07 | – | cvelist |
 | EUVD-2026-12425 | 16 Mar 202615:30 | – | euvd |
 | Mattermost fails to validate team-specific upload_file permissions | 16 Mar 202615:30 | – | github |
 | CVE-2026-4265 | 16 Mar 202612:07 | – | mend |
 | CVE-2026-4265 | 16 Mar 202614:20 | – | nvd |
 | GHSA-XPVF-6QCC-9JQC Mattermost fails to validate team-specific upload_file permissions | 16 Mar 202615:30 | – | osv_ghsa |
10
| Source | Link |
|---|---|
| mattermost | www.mattermost.com/security-updates |
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29 May 2026 00:00Current
6.4Medium risk
Vulners AI Score6.4
CVSS 3.14.3
EPSS0.00227
SSVC