CVE-2026-5163 Missing authorization check in AI message rewrite endpoint allows access to private thread content
| Reporter | Title | Published | Views | Family All 19 |
|---|---|---|---|---|
 | CVE-2026-5163 | 18 May 202608:11 | – | attackerkb |
 | CVE-2026-5163 | 18 May 202614:44 | – | circl |
 | Mattermost 安全漏洞 | 18 May 202600:00 | – | cnnvd |
 | CVE-2026-5163 | 18 May 202608:11 | – | cve |
 | EUVD-2026-30753 | 18 May 202608:11 | – | euvd |
 | Mattermost doesn't verify channel membership when processing AI-assisted message rewrites | 18 May 202609:31 | – | github |
 | Mattermost Server 11.5.x < 11.5.2 Missing Authorization (MMSA-2026-00645) | 22 May 202600:00 | – | nessus |
 | CVE-2026-5163 | 18 May 202608:11 | – | mend |
 | CVE-2026-5163 | 18 May 202609:16 | – | nvd |
 | GHSA-8R89-8W26-CQ32 Mattermost doesn't verify channel membership when processing AI-assisted message rewrites | 18 May 202609:31 | – | osv_ghsa |
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"
}
]
}
]| Source | Link |
|---|---|
| mattermost | www.mattermost.com/security-updates |
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18 May 2026 08:11Current
CVSS 3.16.5
EPSS0.0034
SSVC