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CVE-2026-91159 Discourse: Stored oEmbed HTML injection via allowed iframe

🗓️ 14 Oct 2026 15:30:14Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 32 Views

Stored HTML injection in Discourse oEmbed processing via allowlisted iframe sources.

Related
Affected
Refs
[
  {
    "vendor": "discourse",
    "product": "discourse",
    "versions": [
      {
        "version": "< 2026.1.9",
        "status": "affected"
      },
      {
        "version": ">= 2026.7.0-latest, < 2026.7.3",
        "status": "affected"
      },
      {
        "version": ">= 2026.8.0-latest, < 2026.8.1",
        "status": "affected"
      },
      {
        "version": ">= 2026.9.0-latest, < 2026.9.0",
        "status": "affected"
      }
    ]
  }
]

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14 Oct 2026 15:30Current
CVSS 3.17.7
EPSS0.00435
SSVC
32