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CVE-2026-20719 DoS via URL Previews Rendering Malicious SVGs

🗓️ 25 Mar 2026 16:30:47Reported by MattermostType 
cvelist
 cvelist
🔗 www.cve.org👁 20 Views

Unauthenticated users can crash Mattermost web and desktop apps by external vector graphics in URL previews.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
Circl
CVE-2026-20719
25 Mar 202618:12
circl
CNNVD
Mattermost 安全漏洞
25 Mar 202600:00
cnnvd
CVE
CVE-2026-20719
25 Mar 202616:30
cve
EUVD
EUVD-2026-15485
25 Mar 202618:31
euvd
Github Security Blog
Mattermost: Authenticated DoS through failure to prevent rendering of external SVGs on link embeds
25 Mar 202618:31
github
NVD
CVE-2026-20719
25 Mar 202617:16
nvd
OSV
GHSA-86VC-MG26-FJ6X Mattermost: Authenticated DoS through failure to prevent rendering of external SVGs on link embeds
25 Mar 202618:31
osv
Positive Technologies
PT-2026-27810
25 Mar 202600:00
ptsecurity
RedhatCVE
CVE-2026-20719
26 Mar 202617:00
redhatcve
Snyk
Improper Check for Unusual or Exceptional Conditions
25 Mar 202618:31
snyk
Rows per page
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "11.4.0",
        "status": "affected",
        "version": "11.4.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.3.1",
        "status": "affected",
        "version": "11.3.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "11.2.3",
        "status": "affected",
        "version": "11.2.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "10.11.11",
        "status": "affected",
        "version": "10.11.0",
        "versionType": "semver"
      },
      {
        "version": "11.5.0",
        "status": "unaffected"
      },
      {
        "version": "11.4.1",
        "status": "unaffected"
      },
      {
        "version": "11.3.2",
        "status": "unaffected"
      },
      {
        "version": "11.2.4",
        "status": "unaffected"
      },
      {
        "version": "10.11.12",
        "status": "unaffected"
      }
    ]
  }
]

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