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CVE-2026-72721

🗓️ 10 Aug 2026 15:48:30Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 16 Views

Case-sensitive domain comparison in Discourse Onebox allows blocklist bypass via hostname casing changes.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
ATTACKERKB
CVE-2026-72721
10 Aug 202615:48
attackerkb
cvelist
Cvelist
CVE-2026-72721 Discourse: Onebox Domain Blocklist Bypass via Case-Sensitive Comparison
10 Aug 202615:48
cvelist
euvd
EUVD
EUVD-2026-55657
10 Aug 202615:48
euvd
nvd
NVD
CVE-2026-72721
10 Aug 202616:19
nvd
vulnrichment
Vulnrichment
CVE-2026-72721 Discourse: Onebox Domain Blocklist Bypass via Case-Sensitive Comparison
10 Aug 202615:48
vulnrichment
Vulners
Node
OR
discoursediscourseRange<2026.1.6
discoursediscourseRange2026.5.0-latest2026.5.2
discoursediscourseRange2026.6.0-latest2026.6.1
discoursediscourseRange2026.7.0-latest2026.7.0
[
  {
    "vendor": "discourse",
    "product": "discourse",
    "versions": [
      {
        "version": "< 2026.1.6",
        "status": "affected"
      },
      {
        "version": ">= 2026.5.0-latest, < 2026.5.2",
        "status": "affected"
      },
      {
        "version": ">= 2026.6.0-latest, < 2026.6.1",
        "status": "affected"
      },
      {
        "version": ">= 2026.7.0-latest, < 2026.7.0",
        "status": "affected"
      }
    ]
  }
]

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10 Aug 2026 17:17Current
5.3Medium risk
Vulners AI Score5.3
CVSS 3.15.3
SSVC
16