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CVE-2026-10819

🗓️ 27 Jul 2026 14:15:25Reported by MattermostType 
cve
 cve
🔗 web.nvd.nist.gov👁 3 Views

Mattermost DoS via crafted animated GIF uploaded as a custom emoji due to unbounded frames and missing size cap.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-10819
27 Jul 202614:15
attackerkb
Cvelist
CVE-2026-10819 Mattermost Server Denial of Service via Animated GIF Emoji Upload
27 Jul 202614:15
cvelist
EUVD
EUVD-2026-49254
27 Jul 202614:15
euvd
NVD
CVE-2026-10819
27 Jul 202615:16
nvd
Positive Technologies
PT-2026-64921
27 Jul 202600:00
ptsecurity
Vulnrichment
CVE-2026-10819 Mattermost Server Denial of Service via Animated GIF Emoji Upload
27 Jul 202614:15
vulnrichment
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.6.5",
        "status": "affected",
        "version": "11.6.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "10.11.20",
        "status": "affected",
        "version": "10.11.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.8.1",
        "status": "affected",
        "version": "11.8.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.7.4",
        "status": "affected",
        "version": "11.7.0",
        "versionType": "semver"
      },
      {
        "version": "11.9.0",
        "status": "unaffected"
      },
      {
        "version": "11.6.6",
        "status": "unaffected"
      },
      {
        "version": "10.11.21",
        "status": "unaffected"
      },
      {
        "version": "11.8.2",
        "status": "unaffected"
      },
      {
        "version": "11.7.5",
        "status": "unaffected"
      }
    ]
  }
]

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27 Jul 2026 16:17Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.16.5
SSVC
3