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CVE-2026-4055 Insufficient permission validation on cross-team playbook run creation
| Reporter | Title | Published | Views | Family All 14 |
|---|---|---|---|---|
 | CVE-2026-4055 | 21 May 202607:13 | – | attackerkb |
 | The vulnerability of the Mattermost instant messaging application, related to deficiencies in authentication procedures, allows attackers to bypass existing security mechanisms. | 6 Jul 202600:00 | – | bdu_fstec |
 | Mattermost 安全漏洞 | 21 May 202600:00 | – | cnnvd |
 | CVE-2026-4055 | 21 May 202607:13 | – | cve |
 | EUVD-2026-31221 | 21 May 202607:13 | – | euvd |
 | Mattermost has an Incorrect Authorization issue | 21 May 202609:32 | – | github |
 | Mattermost Server 10.11.x < 10.11.17 / 11.5.x < 11.5.5 / 11.6.x < 11.6.2 Improper Authorization (MMSA-2026-00629) | 28 May 202600:00 | – | nessus |
 | CVE-2026-4055 | 21 May 202608:16 | – | nvd |
 | CVE-2026-4055 Insufficient permission validation on cross-team playbook run creation | 21 May 202607:13 | – | osv |
| GHSA-6CFR-WP44-6QMV Mattermost has an Incorrect Authorization issue | 21 May 202609:32 | – | osv |
10
[
{
"defaultStatus": "unaffected",
"product": "Mattermost",
"vendor": "Mattermost",
"versions": [
{
"lessThanOrEqual": "11.5.1",
"status": "affected",
"version": "11.5.0",
"versionType": "semver"
},
{
"version": "11.6.0",
"status": "unaffected"
},
{
"version": "11.5.2",
"status": "unaffected"
},
{
"version": "10.11.14",
"status": "unaffected"
},
{
"version": "11.4.4",
"status": "unaffected"
}
]
}
]| Source | Link |
|---|---|
| mattermost | www.mattermost.com/security-updates |
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21 May 2026 07:13Current
CVSS 3.14.3
EPSS0.00152