Frappe Builder before 1.36.1 SSRF Guard Bypass via HTTP Redirect

{
  "id": "96655388d27227bbba8ddc46f3a81ec3eb2c166ca2c4d2108c6bbaf1994fd81f",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-115720",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Frappe Builder before 1.36.1 SSRF Guard Bypass via HTTP Redirect",
    "summary": "Frappe Builder before 1.36.1 contains a server-side request forgery vulnerability in builder/api.py where the assert_not_private_url() guard validates only the initial hostname before callers invoke requests.get(url) with default redirect-following and no IP pinning, allowing an attacker-supplied public URL to HTTP-redirect to internal or link-local addresses the guard never validated. An authenticated attacker can call the convert_to_webp endpoint, which lacks a permission decorator, with a URL that redirects to internal targets such as cloud metadata services to perform SSRF, internal port scanning, or trigger a request-hang denial of service due to the missing timeout.",
    "evidence": "cve:CVE-2026-115720",
    "products": [
      {
        "name": {
          "value": "builder",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-115720",
      "aliases": [
        "CVE-2026-115720"
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      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "Safety": "NOT_DEFINED",
            "version": "4.0",
            "Recovery": "NOT_DEFINED",
            "baseScore": 5.3,
            "Automatable": "NOT_DEFINED",
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N",
            "exploitMaturity": "NOT_DEFINED",
            "providerUrgency": "NOT_DEFINED",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "privilegesRequired": "LOW",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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              "value": "GENERAL"
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            "version": "3.1",
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N",
            "integrityImpact": "NONE",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "NONE",
            "privilegesRequired": "LOW",
            "confidentialityImpact": "LOW"
          },
          "scenarios": [
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              "value": "GENERAL"
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      "affected": [
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          "repo": "https://github.com/frappe/builder",
          "vendor": "frappe",
          "product": "builder",
          "versions": [
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              "status": "affected",
              "version": "1.0.0",
              "lessThan": "1.36.1",
              "versionType": "semver"
            }
          ],
          "packageURL": "pkg:github/frappe/builder",
          "defaultStatus": "unaffected"
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      ],
      "modified": "2026-10-26T19:48:35.644Z",
      "provider": "cve",
      "references": [
        "https://github.com/frappe/builder/releases/tag/v1.36.1",
        "https://github.com/frappe/builder/security/advisories/GHSA-hvrf-fhv3-3v7p",
        "https://www.vulncheck.com/advisories/frappe-builder-before-ssrf-guard-bypass-via-http-redirect"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-115720",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-26T19:30:42.646409Z"
                  }
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            "providerMetadata": {
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        "cna": {
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          "shortName": "VulnCheck",
          "dateUpdated": "2026-10-26T12:02:25.906Z"
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    "related_cves": [
      {
        "value": "CVE-2026-115720",
        "evidence": "/cveMetadata/cveId"
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    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 338311,
  "published_at": "2026-10-26T12:02:25.906+00:00"
}