GCVE-1-2026-20038 (CVE-2026-69078)

Vulnerability from gna-1 – Published: 2026-08-03 09:12 – Updated: 2026-08-03 09:12
VLAI
Title
Server-Side Request Forgery and Local File Disclosure in CTI-Transmute Evaluation PDF Rendering
Summary
CTI-Transmute is affected by a server-side request forgery vulnerability in the evaluation report PDF-generation functionality. User-controlled CTI content, including conversion names, descriptions, and comments, is converted from Markdown to HTML and rendered as a PDF using WeasyPrint. Before the patch, the renderer used WeasyPrint’s default URL-fetching behavior without restricting the protocols or destinations that could be referenced by the generated HTML. An attacker able to supply content included in an evaluation report could inject crafted resource references using schemes such as http://, https://, or file://. When the report was rendered, CTI-Transmute could fetch these resources using the application server’s network connectivity and filesystem privileges. Successful exploitation could allow an attacker to: * access services available only from the CTI-Transmute server or its internal network; * probe internal hosts and service endpoints; * retrieve local files readable by the application process; and * expose fetched content through the generated PDF, depending on the referenced resource type and rendering context. The vulnerability is corrected by providing WeasyPrint with a restrictive URL fetcher that permits only self-contained data: URIs. The externally hosted Google Fonts stylesheet was also removed so that PDF generation performs no intentional network or filesystem fetches.
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version
misp cti-transmute Affected: 0 , ≤ 1.4.0 (semver)
Create a notification for this product.
Credits
🕵️‍♂️ Jeroen Pinoy 🐞 Christian Studer

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "cti-transmute",
          "repo": "https://github.com/MISP/cti-transmute/",
          "vendor": "misp",
          "versions": [
            {
              "lessThanOrEqual": "1.4.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Jeroen Pinoy"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Christian Studer"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eCTI-Transmute is affected by a server-side request forgery vulnerability in the evaluation report PDF-generation functionality.\u003c/p\u003e\u003cp\u003eUser-controlled CTI content, including conversion names, descriptions, and comments, is converted from Markdown to HTML and rendered as a PDF using WeasyPrint. Before the patch, the renderer used WeasyPrint\u2019s default URL-fetching behavior without restricting the protocols or destinations that could be referenced by the generated HTML.\u003c/p\u003e\u003cp\u003eAn attacker able to supply content included in an evaluation report could inject crafted resource references using schemes such as \u003ccode\u003ehttp://\u003c/code\u003e, \u003ccode\u003ehttps://\u003c/code\u003e, or \u003ccode\u003efile://\u003c/code\u003e. When the report was rendered, CTI-Transmute could fetch these resources using the application server\u2019s network connectivity and filesystem privileges.\u003c/p\u003e\u003cp\u003eSuccessful exploitation could allow an attacker to:\u003c/p\u003e\u003cul\u003e\u003cli\u003eaccess services available only from the CTI-Transmute server or its internal network;\u003c/li\u003e\u003cli\u003eprobe internal hosts and service endpoints;\u003c/li\u003e\u003cli\u003eretrieve local files readable by the application process; and\u003c/li\u003e\u003cli\u003eexpose fetched content through the generated PDF, depending on the referenced resource type and rendering context.\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eThe vulnerability is corrected by providing WeasyPrint with a restrictive URL fetcher that permits only self-contained \u003ccode\u003edata:\u003c/code\u003e URIs. The externally hosted Google Fonts stylesheet was also removed so that PDF generation performs no intentional network or filesystem fetches.\u003c/p\u003e\u003ch2\u003e\u003c/h2\u003e\u003cbr\u003e"
            }
          ],
          "value": "CTI-Transmute is affected by a server-side request forgery vulnerability in the evaluation report PDF-generation functionality.\n\nUser-controlled CTI content, including conversion names, descriptions, and comments, is converted from Markdown to HTML and rendered as a PDF using WeasyPrint. Before the patch, the renderer used WeasyPrint\u2019s default URL-fetching behavior without restricting the protocols or destinations that could be referenced by the generated HTML.\n\nAn attacker able to supply content included in an evaluation report could inject crafted resource references using schemes such as http://, https://, or file://. When the report was rendered, CTI-Transmute could fetch these resources using the application server\u2019s network connectivity and filesystem privileges.\n\nSuccessful exploitation could allow an attacker to:\n\n  *  access services available only from the CTI-Transmute server or its internal network;\n  *  probe internal hosts and service endpoints;\n  *  retrieve local files readable by the application process; and\n  *  expose fetched content through the generated PDF, depending on the referenced resource type and rendering context.\n\n\nThe vulnerability is corrected by providing WeasyPrint with a restrictive URL fetcher that permits only self-contained data: URIs. The externally hosted Google Fonts stylesheet was also removed so that PDF generation performs no intentional network or filesystem fetches."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-664",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-664 Server Side Request Forgery"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "LOW",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918 Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "orgId": "00000000-0000-4000-9000-000000000000"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/MISP/cti-transmute/commit/20f35307bcb706c8dd8ca3884a88fb36b05b5244"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Server-Side Request Forgery and Local File Disclosure in CTI-Transmute Evaluation PDF Rendering",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "00000000-0000-4000-9000-000000000000",
    "cveId": "CVE-2026-69078",
    "datePublished": "2026-08-03T09:12:35.857068Z",
    "dateReserved": "2026-08-03T09:12:51.405Z",
    "dateUpdated": "2026-08-03T09:12:51.486751Z",
    "requesterUserId": "00000000-0000-4000-9000-000000000000",
    "serial": 1,
    "state": "PUBLISHED",
    "vulnId": "gcve-1-2026-20038"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}



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