{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-3125",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-04T18:58:41.207814Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-04T18:58:56.614Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://www.npmjs.com/package/@opennextjs/cloudflare",
          "defaultStatus": "unaffected",
          "modules": [
            "packages/cloudflare/src/cli/templates/worker.ts"
          ],
          "packageName": "@opennextjs/cloudflare",
          "platforms": [
            "Cloudflare Workers"
          ],
          "product": "@opennextjs/cloudflare",
          "repo": "https://github.com/opennextjs/opennextjs-cloudflare",
          "vendor": "opennextjs",
          "versions": [
            {
              "lessThan": "1.17.1",
              "status": "affected",
              "version": "0",
              "versionType": "npm"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "https://x.com/ez_z3r"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eA Server-Side Request Forgery (SSRF) vulnerability was identified in the @opennextjs/cloudflare package, resulting from a path normalization bypass in the /cdn-cgi/image/ handler.\u003c/span\u003e\u003cspan style=\"background-color: transparent;\"\u003eThe @opennextjs/cloudflare worker template includes a /cdn-cgi/image/ handler intended for development use only. In production, Cloudflare\u0027s edge intercepts /cdn-cgi/image/ requests before they reach the Worker. However, by substituting a backslash for a forward slash (/cdn-cgi\\image/ instead of /cdn-cgi/image/), an attacker can bypass edge interception and have the request reach the Worker directly. The JavaScript URL class then normalizes the backslash to a forward slash, causing the request to match the handler and trigger an unvalidated fetch of arbitrary remote URLs.\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eFor example: \u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003e\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://victim-site.com/cdn-cgi\\image/aaaa/https://attacker.com\"\u003ehttps://victim-site.com/cdn-cgi\\image/aaaa/https://attacker.com\u003c/a\u003e\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eIn this example, attacker-controlled content from attacker.com is served through the victim site\u0027s domain (victim-site.com), violating the same-origin policy and potentially misleading users or other services.\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eNote: This bypass only works via HTTP clients that preserve backslashes in paths (e.g., curl --path-as-is). Browsers normalize backslashes to forward slashes before sending requests.\u003c/span\u003e\u003c/p\u003e\u003cspan style=\"background-color: transparent;\"\u003eAdditionally, Cloudflare Workers with Assets and Cloudflare Pages suffer from a similar vulnerability. Assets stored under /cdn-cgi/ paths are not publicly accessible under normal conditions. However, using the same backslash bypass (/cdn-cgi\u003c/span\u003e\u003cspan style=\"background-color: transparent;\"\u003e\\.\u003c/span\u003e\u003cspan style=\"background-color: transparent;\"\u003e.. instead of /cdn-cgi/...), these assets become publicly accessible. This could be used to retrieve private data. For example, Open Next projects store incremental cache data under /cdn-cgi/_next_cache, which could be exposed via this bypass.\u003c/span\u003e\u003cbr\u003e"
            }
          ],
          "value": "A Server-Side Request Forgery (SSRF) vulnerability was identified in the @opennextjs/cloudflare package, resulting from a path normalization bypass in the /cdn-cgi/image/ handler.The @opennextjs/cloudflare worker template includes a /cdn-cgi/image/ handler intended for development use only. In production, Cloudflare\u0027s edge intercepts /cdn-cgi/image/ requests before they reach the Worker. However, by substituting a backslash for a forward slash (/cdn-cgi\\image/ instead of /cdn-cgi/image/), an attacker can bypass edge interception and have the request reach the Worker directly. The JavaScript URL class then normalizes the backslash to a forward slash, causing the request to match the handler and trigger an unvalidated fetch of arbitrary remote URLs.\n\nFor example: \n\n https://victim-site.com/cdn-cgi\\image/aaaa/https://attacker.com \n\nIn this example, attacker-controlled content from attacker.com is served through the victim site\u0027s domain (victim-site.com), violating the same-origin policy and potentially misleading users or other services.\n\nNote: This bypass only works via HTTP clients that preserve backslashes in paths (e.g., curl --path-as-is). Browsers normalize backslashes to forward slashes before sending requests.\n\nAdditionally, Cloudflare Workers with Assets and Cloudflare Pages suffer from a similar vulnerability. Assets stored under /cdn-cgi/ paths are not publicly accessible under normal conditions. However, using the same backslash bypass (/cdn-cgi\\... instead of /cdn-cgi/...), these assets become publicly accessible. This could be used to retrieve private data. For example, Open Next projects store incremental cache data under /cdn-cgi/_next_cache, which could be exposed via this bypass."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-664",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-664 Server Side Request Forgery"
            }
          ]
        },
        {
          "capecId": "CAPEC-267",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-267 Leverage Alternate Encoding"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:H/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "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"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-706",
              "description": "CWE-706 Use of Incorrectly-Resolved Name or Reference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-04T18:14:31.111Z",
        "orgId": "a22f1246-ba21-4bb4-a601-ad51614c1513",
        "shortName": "cloudflare"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/opennextjs/opennextjs-cloudflare/pull/1147"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.npmjs.com/package/@opennextjs/cloudflare/v/1.17.1"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://github.com/advisories/GHSA-rvpw-p7vw-wj3m"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://www.cve.org/cverecord?id=CVE-2025-6087"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eServer-side updates to Cloudflare\u0027s Workers platform to block backslash path normalization bypasses for /cdn-cgi requests. The update automatically mitigates the issue for all existing and any future sites deployed to Cloudflare Workers.\u003c/span\u003e\u003c/p\u003e\u003cbr\u003e\u003cbr\u003e"
            }
          ],
          "value": "Server-side updates to Cloudflare\u0027s Workers platform to block backslash path normalization bypasses for /cdn-cgi requests. The update automatically mitigates the issue for all existing and any future sites deployed to Cloudflare Workers."
        },
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eIn addition to the platform level fix, \u003c/span\u003e\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://github.com/opennextjs/opennextjs-cloudflare/pull/1147\"\u003e\u003cspan style=\"background-color: transparent;\"\u003eroot cause fix\u003c/span\u003e\u003c/a\u003e\u003cspan style=\"background-color: transparent;\"\u003e has been implemented to the Cloudflare adapter for Open Next. The patched version of the adapter is found at @opennextjs/cloudflare@1.17.1 (\u003c/span\u003e\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://www.npmjs.com/package/@opennextjs/cloudflare\"\u003e\u003cspan style=\"background-color: transparent;\"\u003ehttps://www.npmjs.com/package/@opennextjs/cloudflare\u003c/span\u003e\u003c/a\u003e\u003cspan style=\"background-color: transparent;\"\u003e)\u003c/span\u003e\u003c/p\u003e\u003cbr\u003e\u003cbr\u003e"
            }
          ],
          "value": "In addition to the platform level fix,  root cause fix https://github.com/opennextjs/opennextjs-cloudflare/pull/1147  has been implemented to the Cloudflare adapter for Open Next. The patched version of the adapter is found at @opennextjs/cloudflare@1.17.1 ( https://www.npmjs.com/package/@opennextjs/cloudflare https://www.npmjs.com/package/@opennextjs/cloudflare )"
        },
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://github.com/opennextjs/opennextjs-cloudflare/pull/1150\"\u003e\u003cspan style=\"background-color: transparent;\"\u003eDependency update\u003c/span\u003e\u003c/a\u003e\u003cspan style=\"background-color: transparent;\"\u003e to the Next.js template used with create-cloudflare (c3) to use the fixed version of the Cloudflare adapter for Open Next.\u003c/span\u003e\u003cbr\u003e"
            }
          ],
          "value": "Dependency update https://github.com/opennextjs/opennextjs-cloudflare/pull/1150  to the Next.js template used with create-cloudflare (c3) to use the fixed version of the Cloudflare adapter for Open Next."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "SSRF vulnerability in opennextjs-cloudflare via /cdn-cgi/ path normalization bypass",
      "x_generator": {
        "engine": "Vulnogram 0.5.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a22f1246-ba21-4bb4-a601-ad51614c1513",
    "assignerShortName": "cloudflare",
    "cveId": "CVE-2026-3125",
    "datePublished": "2026-03-04T18:14:31.111Z",
    "dateReserved": "2026-02-24T14:15:54.385Z",
    "dateUpdated": "2026-03-04T18:58:56.614Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-3125\",\"sourceIdentifier\":\"cna@cloudflare.com\",\"published\":\"2026-03-04T19:16:19.730\",\"lastModified\":\"2026-03-09T17:51:18.853\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A Server-Side Request Forgery (SSRF) vulnerability was identified in the @opennextjs/cloudflare package, resulting from a path normalization bypass in the /cdn-cgi/image/ handler.The @opennextjs/cloudflare worker template includes a /cdn-cgi/image/ handler intended for development use only. In production, Cloudflare\u0027s edge intercepts /cdn-cgi/image/ requests before they reach the Worker. However, by substituting a backslash for a forward slash (/cdn-cgi\\\\image/ instead of /cdn-cgi/image/), an attacker can bypass edge interception and have the request reach the Worker directly. The JavaScript URL class then normalizes the backslash to a forward slash, causing the request to match the handler and trigger an unvalidated fetch of arbitrary remote URLs.\\n\\nFor example: \\n\\n https://victim-site.com/cdn-cgi\\\\image/aaaa/https://attacker.com \\n\\nIn this example, attacker-controlled content from attacker.com is served through the victim site\u0027s domain (victim-site.com), violating the same-origin policy and potentially misleading users or other services.\\n\\nNote: This bypass only works via HTTP clients that preserve backslashes in paths (e.g., curl --path-as-is). Browsers normalize backslashes to forward slashes before sending requests.\\n\\nAdditionally, Cloudflare Workers with Assets and Cloudflare Pages suffer from a similar vulnerability. Assets stored under /cdn-cgi/ paths are not publicly accessible under normal conditions. However, using the same backslash bypass (/cdn-cgi\\\\... instead of /cdn-cgi/...), these assets become publicly accessible. This could be used to retrieve private data. For example, Open Next projects store incremental cache data under /cdn-cgi/_next_cache, which could be exposed via this bypass.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad de falsificaci\u00f3n de petici\u00f3n del lado del servidor (SSRF) fue identificada en el paquete @opennextjs/cloudflare, resultante de un bypass de normalizaci\u00f3n de ruta en el gestor /cdn-cgi/image/. La plantilla de worker @opennextjs/cloudflare incluye un gestor /cdn-cgi/image/ destinado solo para uso en desarrollo. En producci\u00f3n, el edge de Cloudflare intercepta las peticiones /cdn-cgi/image/ antes de que lleguen al Worker. Sin embargo, al sustituir una barra invertida por una barra inclinada (/cdn-cgi\\\\image/ en lugar de /cdn-cgi/image/), un atacante puede eludir la intercepci\u00f3n del edge y hacer que la petici\u00f3n llegue directamente al Worker. La clase URL de JavaScript luego normaliza la barra invertida a una barra inclinada, haciendo que la petici\u00f3n coincida con el gestor y desencadene una obtenci\u00f3n no validada de URLs remotas arbitrarias.\\n\\nPor ejemplo:\\n\\nhttps://victim-site.com/cdn-cgi\\\\image/aaaa/https://attacker.com\\n\\nEn este ejemplo, contenido controlado por el atacante de attacker.com se sirve a trav\u00e9s del dominio del sitio v\u00edctima (victim-site.com), violando la pol\u00edtica de mismo origen y potencialmente enga\u00f1ando a usuarios u otros servicios.\\n\\nNota: Este bypass solo funciona a trav\u00e9s de clientes HTTP que preservan las barras invertidas en las rutas (p. ej., curl --path-as-is). Los navegadores normalizan las barras invertidas a barras inclinadas antes de enviar las peticiones.\\n\\nAdem\u00e1s, Cloudflare Workers con Assets y Cloudflare Pages sufren de una vulnerabilidad similar. Los Assets almacenados bajo rutas /cdn-cgi/ no son accesibles p\u00fablicamente bajo condiciones normales. Sin embargo, utilizando el mismo bypass de barra invertida (/cdn-cgi\\\\... en lugar de /cdn-cgi/...), estos assets se vuelven accesibles p\u00fablicamente. Esto podr\u00eda usarse para recuperar datos privados. Por ejemplo, los proyectos Open Next almacenan datos de cach\u00e9 incremental bajo /cdn-cgi/_next_cache, que podr\u00edan ser expuestos a trav\u00e9s de este bypass.\"}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"cna@cloudflare.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":7.7,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"LOW\",\"vulnIntegrityImpact\":\"LOW\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"HIGH\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":2.5}]},\"weaknesses\":[{\"source\":\"cna@cloudflare.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-706\"},{\"lang\":\"en\",\"value\":\"CWE-918\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-918\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:opennextjs:opennext_for_cloudflare:*:*:*:*:*:node.js:*:*\",\"versionEndExcluding\":\"1.17.1\",\"matchCriteriaId\":\"FFD587A5-A6DA-4D83-9903-7AD395DE5744\"}]}]}],\"references\":[{\"url\":\"https://github.com/advisories/GHSA-rvpw-p7vw-wj3m\",\"source\":\"cna@cloudflare.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://github.com/opennextjs/opennextjs-cloudflare/pull/1147\",\"source\":\"cna@cloudflare.com\",\"tags\":[\"Issue Tracking\",\"Patch\"]},{\"url\":\"https://www.cve.org/cverecord?id=CVE-2025-6087\",\"source\":\"cna@cloudflare.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.npmjs.com/package/@opennextjs/cloudflare/v/1.17.1\",\"source\":\"cna@cloudflare.com\",\"tags\":[\"Product\",\"Release Notes\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-3125\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-04T18:58:41.207814Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-04T18:58:46.967Z\"}}], \"cna\": {\"title\": \"SSRF vulnerability in opennextjs-cloudflare via /cdn-cgi/ path normalization bypass\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"https://x.com/ez_z3r\"}], \"impacts\": [{\"capecId\": \"CAPEC-664\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-664 Server Side Request Forgery\"}]}, {\"capecId\": \"CAPEC-267\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-267 Leverage Alternate Encoding\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 7.7, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:H/SI:N/SA:N\", \"exploitMaturity\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"LOW\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"HIGH\", \"vulnConfidentialityImpact\": \"LOW\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/opennextjs/opennextjs-cloudflare\", \"vendor\": \"opennextjs\", \"modules\": [\"packages/cloudflare/src/cli/templates/worker.ts\"], \"product\": \"@opennextjs/cloudflare\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"1.17.1\", \"versionType\": \"npm\"}], \"platforms\": [\"Cloudflare Workers\"], \"packageName\": \"@opennextjs/cloudflare\", \"collectionURL\": \"https://www.npmjs.com/package/@opennextjs/cloudflare\", \"defaultStatus\": \"unaffected\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"Server-side updates to Cloudflare\u0027s Workers platform to block backslash path normalization bypasses for /cdn-cgi requests. The update automatically mitigates the issue for all existing and any future sites deployed to Cloudflare Workers.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eServer-side updates to Cloudflare\u0027s Workers platform to block backslash path normalization bypasses for /cdn-cgi requests. The update automatically mitigates the issue for all existing and any future sites deployed to Cloudflare Workers.\u003c/span\u003e\u003c/p\u003e\u003cbr\u003e\u003cbr\u003e\", \"base64\": false}]}, {\"lang\": \"en\", \"value\": \"In addition to the platform level fix,  root cause fix https://github.com/opennextjs/opennextjs-cloudflare/pull/1147  has been implemented to the Cloudflare adapter for Open Next. The patched version of the adapter is found at @opennextjs/cloudflare@1.17.1 ( https://www.npmjs.com/package/@opennextjs/cloudflare https://www.npmjs.com/package/@opennextjs/cloudflare )\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eIn addition to the platform level fix, \u003c/span\u003e\u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://github.com/opennextjs/opennextjs-cloudflare/pull/1147\\\"\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eroot cause fix\u003c/span\u003e\u003c/a\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003e has been implemented to the Cloudflare adapter for Open Next. The patched version of the adapter is found at @opennextjs/cloudflare@1.17.1 (\u003c/span\u003e\u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://www.npmjs.com/package/@opennextjs/cloudflare\\\"\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003ehttps://www.npmjs.com/package/@opennextjs/cloudflare\u003c/span\u003e\u003c/a\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003e)\u003c/span\u003e\u003c/p\u003e\u003cbr\u003e\u003cbr\u003e\", \"base64\": false}]}, {\"lang\": \"en\", \"value\": \"Dependency update https://github.com/opennextjs/opennextjs-cloudflare/pull/1150  to the Next.js template used with create-cloudflare (c3) to use the fixed version of the Cloudflare adapter for Open Next.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://github.com/opennextjs/opennextjs-cloudflare/pull/1150\\\"\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eDependency update\u003c/span\u003e\u003c/a\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003e to the Next.js template used with create-cloudflare (c3) to use the fixed version of the Cloudflare adapter for Open Next.\u003c/span\u003e\u003cbr\u003e\", \"base64\": false}]}], \"references\": [{\"url\": \"https://github.com/opennextjs/opennextjs-cloudflare/pull/1147\", \"tags\": [\"patch\"]}, {\"url\": \"https://www.npmjs.com/package/@opennextjs/cloudflare/v/1.17.1\", \"tags\": [\"product\"]}, {\"url\": \"https://github.com/advisories/GHSA-rvpw-p7vw-wj3m\", \"tags\": [\"related\"]}, {\"url\": \"https://www.cve.org/cverecord?id=CVE-2025-6087\", \"tags\": [\"related\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.5.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A Server-Side Request Forgery (SSRF) vulnerability was identified in the @opennextjs/cloudflare package, resulting from a path normalization bypass in the /cdn-cgi/image/ handler.The @opennextjs/cloudflare worker template includes a /cdn-cgi/image/ handler intended for development use only. In production, Cloudflare\u0027s edge intercepts /cdn-cgi/image/ requests before they reach the Worker. However, by substituting a backslash for a forward slash (/cdn-cgi\\\\image/ instead of /cdn-cgi/image/), an attacker can bypass edge interception and have the request reach the Worker directly. The JavaScript URL class then normalizes the backslash to a forward slash, causing the request to match the handler and trigger an unvalidated fetch of arbitrary remote URLs.\\n\\nFor example: \\n\\n https://victim-site.com/cdn-cgi\\\\image/aaaa/https://attacker.com \\n\\nIn this example, attacker-controlled content from attacker.com is served through the victim site\u0027s domain (victim-site.com), violating the same-origin policy and potentially misleading users or other services.\\n\\nNote: This bypass only works via HTTP clients that preserve backslashes in paths (e.g., curl --path-as-is). Browsers normalize backslashes to forward slashes before sending requests.\\n\\nAdditionally, Cloudflare Workers with Assets and Cloudflare Pages suffer from a similar vulnerability. Assets stored under /cdn-cgi/ paths are not publicly accessible under normal conditions. However, using the same backslash bypass (/cdn-cgi\\\\... instead of /cdn-cgi/...), these assets become publicly accessible. This could be used to retrieve private data. For example, Open Next projects store incremental cache data under /cdn-cgi/_next_cache, which could be exposed via this bypass.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eA Server-Side Request Forgery (SSRF) vulnerability was identified in the @opennextjs/cloudflare package, resulting from a path normalization bypass in the /cdn-cgi/image/ handler.\u003c/span\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eThe @opennextjs/cloudflare worker template includes a /cdn-cgi/image/ handler intended for development use only. In production, Cloudflare\u0027s edge intercepts /cdn-cgi/image/ requests before they reach the Worker. However, by substituting a backslash for a forward slash (/cdn-cgi\\\\image/ instead of /cdn-cgi/image/), an attacker can bypass edge interception and have the request reach the Worker directly. The JavaScript URL class then normalizes the backslash to a forward slash, causing the request to match the handler and trigger an unvalidated fetch of arbitrary remote URLs.\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eFor example: \u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003e\u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://victim-site.com/cdn-cgi\\\\image/aaaa/https://attacker.com\\\"\u003ehttps://victim-site.com/cdn-cgi\\\\image/aaaa/https://attacker.com\u003c/a\u003e\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eIn this example, attacker-controlled content from attacker.com is served through the victim site\u0027s domain (victim-site.com), violating the same-origin policy and potentially misleading users or other services.\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eNote: This bypass only works via HTTP clients that preserve backslashes in paths (e.g., curl --path-as-is). Browsers normalize backslashes to forward slashes before sending requests.\u003c/span\u003e\u003c/p\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eAdditionally, Cloudflare Workers with Assets and Cloudflare Pages suffer from a similar vulnerability. Assets stored under /cdn-cgi/ paths are not publicly accessible under normal conditions. However, using the same backslash bypass (/cdn-cgi\u003c/span\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003e\\\\.\u003c/span\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003e.. instead of /cdn-cgi/...), these assets become publicly accessible. This could be used to retrieve private data. For example, Open Next projects store incremental cache data under /cdn-cgi/_next_cache, which could be exposed via this bypass.\u003c/span\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-918\", \"description\": \"CWE-918 Server-Side Request Forgery (SSRF)\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-706\", \"description\": \"CWE-706 Use of Incorrectly-Resolved Name or Reference\"}]}], \"providerMetadata\": {\"orgId\": \"a22f1246-ba21-4bb4-a601-ad51614c1513\", \"shortName\": \"cloudflare\", \"dateUpdated\": \"2026-03-04T18:14:31.111Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-3125\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-04T18:58:56.614Z\", \"dateReserved\": \"2026-02-24T14:15:54.385Z\", \"assignerOrgId\": \"a22f1246-ba21-4bb4-a601-ad51614c1513\", \"datePublished\": \"2026-03-04T18:14:31.111Z\", \"assignerShortName\": \"cloudflare\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}