Lucene search
+L

CVE-2026-9816

🗓️ 17 Aug 2026 22:05:24Reported by MattermostType 
cve
 cve
🔗 web.nvd.nist.gov👁 4 Views

Mattermost 10.11.x to 11.8.x lacks server-side validation of BoardMember.Scheme* fields, enabling privilege escalation via board member endpoints.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-9816
17 Aug 202622:05
attackerkb
cvelist
Cvelist
CVE-2026-9816 Insufficient server-side validation of board member role fields permits privilege escalation
17 Aug 202622:05
cvelist
euvd
EUVD
EUVD-2026-60540
17 Aug 202622:05
euvd
nvd
NVD
CVE-2026-9816
17 Aug 202622:17
nvd
ptsecurity
Positive Technologies
PT-2026-76876
17 Aug 202600:00
ptsecurity
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.7.6",
        "status": "affected",
        "version": "11.7.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "10.11.21",
        "status": "affected",
        "version": "10.11.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.8.3",
        "status": "affected",
        "version": "11.8.0",
        "versionType": "semver"
      },
      {
        "version": "11.9.0",
        "status": "unaffected"
      },
      {
        "version": "11.7.7",
        "status": "unaffected"
      },
      {
        "version": "10.11.22",
        "status": "unaffected"
      },
      {
        "version": "11.8.4",
        "status": "unaffected"
      }
    ]
  }
]

Data

Build on a solid foundation with Vulners data

We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data

Api

Power your application with Vulners API

The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access

App

Assess and manage vulnerabilities with Vulners tools

Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation

17 Aug 2026 22:17Current
5.5Medium risk
Vulners AI Score5.5
CVSS 3.18.3
4