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CVE-2026-8447 Langflow is vulnerable to stored cross-site scripting and IP spoofing due to unsanitized Markdown rendering and untrusted proxy header trust

🗓️ 04 Sep 2026 14:27:03Reported by ibmType 
cvelist
 cvelist
🔗 www.cve.org👁 19 Views

Stored XSS and IP spoofing in Langflow OSS 1.0.0-1.11.2 via unsanitized Markdown and proxy headers.

Related
Affected
Refs
[
  {
    "vendor": "IBM",
    "product": "Langflow OSS",
    "versions": [
      {
        "status": "affected",
        "version": "1.0.0",
        "lessThanOrEqual": "1.11.2",
        "versionType": "semver"
      }
    ],
    "cpes": [
      "cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*",
      "cpe:2.3:a:ibm:langflow_oss:1.11.2:*:*:*:*:*:*:*"
    ]
  }
]

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