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CVE-2026-2578

🗓️ 16 Mar 2026 11:58:09Reported by MattermostType 
cve
 cve
🔗 web.nvd.nist.gov👁 4 Views

CVE-2026-2578: WebSocket post deletion leaks unrevealed burn-on-read contents in Mattermost 11.3.x up to 11.3.0.

Related
Detection
Affected
Refs
NVD
Node
mattermostmattermost_serverRange11.3.011.3.1
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.3.0",
        "status": "affected",
        "version": "11.3.0",
        "versionType": "semver"
      },
      {
        "version": "11.4.0",
        "status": "unaffected"
      },
      {
        "version": "11.3.1",
        "status": "unaffected"
      }
    ]
  }
]

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18 Mar 2026 17:42Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.14.3
EPSS0.00043
SSVC
4