Vulnerability-Lookup

CVE-2024-38537 (GCVE-0-2024-38537)

Vulnerability from cvelistv5 – Published: 2024-07-02 19:50 – Updated: 2024-08-02 04:12

Title

Inclusion of Untrusted polyfill.io Code Vulnerability in fides.js

Summary

Fides is an open-source privacy engineering platform. `fides.js`, a client-side script used to interact with the consent management features of Fides, used the `polyfill.io` domain in a very limited edge case, when it detected a legacy browser such as IE11 that did not support the fetch standard. Therefore it was possible for users of legacy, pre-2017 browsers who navigate to a page serving `fides.js` to download and execute malicious scripts from the `polyfill.io` domain when the domain was compromised and serving malware. No exploitation of `fides.js` via `polyfill.io` has been identified as of time of publication. The vulnerability has been patched in Fides version `2.39.1`. Users are advised to upgrade to this version or later to secure their systems against this threat. On Thursday, June 27, 2024, Cloudflare and Namecheap intervened at a domain level to ensure `polyfill.io` and its subdomains could not resolve to the compromised service, rendering this vulnerability unexploitable. Prior to the domain level intervention, there were no server-side workarounds and the confidentiality, integrity, and availability impacts of this vulnerability were high. Clients could ensure they were not affected by using a modern browser that supported the fetch standard.

Severity

0 (None)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-07-02 20:11 UTC

CWE

CWE-829 - Inclusion of Functionality from Untrusted Control Sphere

Assigner

GitHub_M mitre root

References

5 references

URL	Tags
https://github.com/ethyca/fides/security/advisori…	x_refsource_CONFIRM
https://github.com/ethyca/fides/pull/5026	x_refsource_MISC
https://github.com/ethyca/fides/commit/868c4d6297…	x_refsource_MISC
https://fetch.spec.whatwg.org	x_refsource_MISC
https://sansec.io/research/polyfill-supply-chain-attack	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
ethyca	fides	Affected: < 2.39.1	guessed

Show details on NVD website

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    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-38537\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-07-02T20:11:37.728266Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-07-02T20:11:41.164Z\"}}], \"cna\": {\"title\": \"Inclusion of Untrusted polyfill.io Code Vulnerability in fides.js\", \"source\": {\"advisory\": \"GHSA-cvw4-c69g-7v7m\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 0, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"NONE\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"ethyca\", \"product\": \"fides\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 2.39.1\"}]}], \"references\": [{\"url\": \"https://github.com/ethyca/fides/security/advisories/GHSA-cvw4-c69g-7v7m\", \"name\": \"https://github.com/ethyca/fides/security/advisories/GHSA-cvw4-c69g-7v7m\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/ethyca/fides/pull/5026\", \"name\": \"https://github.com/ethyca/fides/pull/5026\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/ethyca/fides/commit/868c4d629760572192bd61db34f5a4458ed12005\", \"name\": \"https://github.com/ethyca/fides/commit/868c4d629760572192bd61db34f5a4458ed12005\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://fetch.spec.whatwg.org\", \"name\": \"https://fetch.spec.whatwg.org\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://sansec.io/research/polyfill-supply-chain-attack\", \"name\": \"https://sansec.io/research/polyfill-supply-chain-attack\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Fides is an open-source privacy engineering platform. `fides.js`, a client-side script used to interact with the consent management features of Fides, used the `polyfill.io` domain in a very limited edge case, when it detected a legacy browser such as IE11 that did not support the fetch standard. Therefore it was possible for users of legacy, pre-2017 browsers who navigate to a page serving `fides.js` to download and execute malicious scripts from the `polyfill.io` domain when the domain was compromised and serving malware. No exploitation of `fides.js` via `polyfill.io` has been identified as of time of publication.\\n\\nThe vulnerability has been patched in Fides version `2.39.1`. Users are advised to upgrade to this version or later to secure their systems against this threat. On Thursday, June 27, 2024, Cloudflare and Namecheap intervened at a domain level to ensure `polyfill.io` and its subdomains could not resolve to the compromised service, rendering this vulnerability unexploitable. Prior to the domain level intervention, there were no server-side workarounds and the confidentiality, integrity, and availability impacts of this vulnerability were high. Clients could ensure they were not affected by using a modern browser that supported the fetch standard.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-829\", \"description\": \"CWE-829: Inclusion of Functionality from Untrusted Control Sphere\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2024-07-02T19:50:10.275Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-38537\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-07-02T20:11:44.703Z\", \"dateReserved\": \"2024-06-18T16:37:02.729Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2024-07-02T19:50:10.275Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}

FKIE_CVE-2024-38537

Vulnerability from fkie_nvd - Published: 2024-07-02 20:15 - Updated: 2026-06-17 07:40

Severity

0.0 (None) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

URL	Tags
security-advisories@github.com	https://fetch.spec.whatwg.org	Product
security-advisories@github.com	https://github.com/ethyca/fides/commit/868c4d629760572192bd61db34f5a4458ed12005	Patch
security-advisories@github.com	https://github.com/ethyca/fides/pull/5026	Issue Tracking, Patch
security-advisories@github.com	https://github.com/ethyca/fides/security/advisories/GHSA-cvw4-c69g-7v7m	Patch, Third Party Advisory
security-advisories@github.com	https://sansec.io/research/polyfill-supply-chain-attack	Product
af854a3a-2127-422b-91ae-364da2661108	https://fetch.spec.whatwg.org	Product
af854a3a-2127-422b-91ae-364da2661108	https://github.com/ethyca/fides/commit/868c4d629760572192bd61db34f5a4458ed12005	Patch
af854a3a-2127-422b-91ae-364da2661108	https://github.com/ethyca/fides/pull/5026	Issue Tracking, Patch
af854a3a-2127-422b-91ae-364da2661108	https://github.com/ethyca/fides/security/advisories/GHSA-cvw4-c69g-7v7m	Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://sansec.io/research/polyfill-supply-chain-attack	Product

Impacted products

	Vendor	Product	Version
	ethyca	fides	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "fides",
          "vendor": "ethyca",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.39.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ethyca:fides:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "960B2BA6-88EF-4A6D-A506-5F699C28EFA0",
              "versionEndExcluding": "2.39.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Fides is an open-source privacy engineering platform. `fides.js`, a client-side script used to interact with the consent management features of Fides, used the `polyfill.io` domain in a very limited edge case, when it detected a legacy browser such as IE11 that did not support the fetch standard. Therefore it was possible for users of legacy, pre-2017 browsers who navigate to a page serving `fides.js` to download and execute malicious scripts from the `polyfill.io` domain when the domain was compromised and serving malware. No exploitation of `fides.js` via `polyfill.io` has been identified as of time of publication.\n\nThe vulnerability has been patched in Fides version `2.39.1`. Users are advised to upgrade to this version or later to secure their systems against this threat. On Thursday, June 27, 2024, Cloudflare and Namecheap intervened at a domain level to ensure `polyfill.io` and its subdomains could not resolve to the compromised service, rendering this vulnerability unexploitable. Prior to the domain level intervention, there were no server-side workarounds and the confidentiality, integrity, and availability impacts of this vulnerability were high. Clients could ensure they were not affected by using a modern browser that supported the fetch standard."
    },
    {
      "lang": "es",
      "value": "Fides es una plataforma de ingenier\u00eda de privacidad de c\u00f3digo abierto. `fides.js`, un script del lado del cliente utilizado para interactuar con las funciones de gesti\u00f3n de consentimiento de Fides, utiliz\u00f3 el dominio `polyfill.io` en un caso l\u00edmite muy limitado, cuando detect\u00f3 un navegador heredado como IE11 que no admit\u00eda el est\u00e1ndar de recuperaci\u00f3n. Por lo tanto, era posible que los usuarios de navegadores heredados anteriores a 2017 que navegaban a una p\u00e1gina que serv\u00eda `fides.js` descargaran y ejecutaran scripts maliciosos desde el dominio `polyfill.io` cuando el dominio estaba comprometido y serv\u00eda malware. No se ha identificado ninguna explotaci\u00f3n de `fides.js` a trav\u00e9s de `polyfill.io` al momento de la publicaci\u00f3n. La vulnerabilidad ha sido parcheada en la versi\u00f3n `2.39.1` de Fides. Se recomienda a los usuarios que actualicen a esta versi\u00f3n o posterior para proteger sus sistemas contra esta amenaza. El jueves 27 de junio de 2024, Cloudflare y Namecheap intervinieron a nivel de dominio para garantizar que `polyfill.io` y sus subdominios no pudieran resolver el servicio comprometido, haciendo que esta vulnerabilidad no se pudiera explotar. Antes de la intervenci\u00f3n a nivel de dominio, no hab\u00eda workarounds en el lado del servidor y los impactos de esta vulnerabilidad en la confidencialidad, integridad y disponibilidad eran altos. Los clientes pod\u00edan asegurarse de no verse afectados utilizando un navegador moderno que admitiera el est\u00e1ndar de recuperaci\u00f3n."
    }
  ],
  "id": "CVE-2024-38537",
  "lastModified": "2026-06-17T07:40:29.600",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 0.0,
          "baseSeverity": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 0.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-38537",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-07-02T20:11:37.728266Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-07-02T20:15:05.860",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product"
      ],
      "url": "https://fetch.spec.whatwg.org"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/ethyca/fides/commit/868c4d629760572192bd61db34f5a4458ed12005"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/ethyca/fides/pull/5026"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/ethyca/fides/security/advisories/GHSA-cvw4-c69g-7v7m"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product"
      ],
      "url": "https://sansec.io/research/polyfill-supply-chain-attack"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product"
      ],
      "url": "https://fetch.spec.whatwg.org"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/ethyca/fides/commit/868c4d629760572192bd61db34f5a4458ed12005"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/ethyca/fides/pull/5026"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/ethyca/fides/security/advisories/GHSA-cvw4-c69g-7v7m"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product"
      ],
      "url": "https://sansec.io/research/polyfill-supply-chain-attack"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-829"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-CVW4-C69G-7V7M

Vulnerability from github – Published: 2024-07-02 21:20 – Updated: 2024-07-05 21:27

Summary

Inclusion of Untrusted polyfill.io Code Vulnerability in fides.js

Details

Note

On Thursday, June 27, 2024, Cloudflare and Namecheap intervened at a domain level to ensure polyfill.io and its subdomains could not resolve to the compromised service, rendering this vulnerability unexploitable.

The following sections describe this vulnerability prior to the domain level intervention, when it was still exploitable.

Impact

fides.js, a client-side script used to interact with the consent management features of Fides, used the polyfill.io domain in a very limited edge case, when it detected a legacy browser such as IE11 that did not support the fetch standard.

On June 25th, 2024, Sansec published the following regarding the polyfill.io domain.

The polyfill.js is a popular open source library to support older browsers. 100K+ sites embed it using the cdn.polyfill.io domain... However, in February this year, a Chinese company bought the domain and the Github account. Since then, this domain was caught injecting malware on mobile devices via any site that embeds cdn.polyfill.io.

Therefore it was possible for users of legacy, pre-2017 browsers who navigate to a page serving fides.js to download and execute malicious scripts from the compromised domain.

No exploitation of fides.js via polyfill.io has been identified at this time, but other script developers who use https://cdn.polyfill.io/v2/polyfill.min.js have reported redirects to malicious websites.

Patches

The vulnerability has been patched in Fides version 2.39.1. Users are advised to upgrade to this version or later to secure their systems against this threat.

Workarounds

Prior to the domain level intervention, there were no server-side workarounds and the confidentiality, integrity, and availability impacts of this vulnerability were high.

Clients could ensure they were not affected by using a modern browser that supported the fetch standard. caniuse.com/fetch estimates that 97.52% of browser users use a browser that supports the fetch standard.

References

https://sansec.io/research/polyfill-supply-chain-attack
https://github.com/ethyca/fides/pull/5026/
https://fetch.spec.whatwg.org/

Severity

0.0 (None)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "ethyca-fides"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.39.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-38537"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-829"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-07-02T21:20:07Z",
    "nvd_published_at": "2024-07-02T20:15:05Z",
    "severity": "LOW"
  },
  "details": "### Note\n\nOn Thursday, June 27, 2024, Cloudflare and Namecheap intervened at a domain level to ensure `polyfill.io` and its subdomains could not resolve to the compromised service, rendering this vulnerability **unexploitable**.\n\nThe following sections describe this vulnerability prior to the domain level intervention, when it was still exploitable.\n\n### Impact\n\n`fides.js`, a client-side script used to interact with the consent management features of Fides, used the `polyfill.io` domain in a very limited edge case, when it detected a legacy browser such as IE11 that did not support the fetch standard.\n\nOn June 25th, 2024, Sansec published the following regarding the `polyfill.io` domain.\n\n\u003e The polyfill.js is a popular open source library to support older browsers. 100K+ sites embed it using the cdn.polyfill.io domain... However, in February this year, a Chinese company bought the domain and the Github account. Since then, this domain was caught injecting malware on mobile devices via any site that embeds cdn.polyfill.io.\n\nTherefore it was possible for users of legacy, pre-2017 browsers who navigate to a page serving `fides.js` to download and execute malicious scripts from the compromised domain.\n\nNo exploitation of `fides.js` via `polyfill.io` has been identified at this time, but other script developers who use `https://cdn.polyfill.io/v2/polyfill.min.js` have reported redirects to malicious websites.\n\n### Patches\nThe vulnerability has been patched in Fides version `2.39.1`. Users are advised to upgrade to this version or later to secure their systems against this threat.\n\n### Workarounds\n\nPrior to the domain level intervention, there were no server-side workarounds and the confidentiality, integrity, and availability impacts of this vulnerability were high. \n\nClients could ensure they were not affected by using a modern browser that supported the fetch standard. caniuse.com/fetch estimates that 97.52% of browser users use a browser that supports the fetch standard.\n\n### References\n- https://sansec.io/research/polyfill-supply-chain-attack\n- https://github.com/ethyca/fides/pull/5026/\n- https://fetch.spec.whatwg.org/",
  "id": "GHSA-cvw4-c69g-7v7m",
  "modified": "2024-07-05T21:27:24Z",
  "published": "2024-07-02T21:20:07Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ethyca/fides/security/advisories/GHSA-cvw4-c69g-7v7m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38537"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ethyca/fides/pull/5026"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ethyca/fides/commit/868c4d629760572192bd61db34f5a4458ed12005"
    },
    {
      "type": "WEB",
      "url": "https://fetch.spec.whatwg.org"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ethyca/fides"
    },
    {
      "type": "WEB",
      "url": "https://sansec.io/research/polyfill-supply-chain-attack"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Inclusion of Untrusted polyfill.io Code Vulnerability in fides.js"
}

PYSEC-2026-1339

Vulnerability from pysec - Published: 2026-07-07 14:34 - Updated: 2026-07-07 17:24

Details

Note

The following sections describe this vulnerability prior to the domain level intervention, when it was still exploitable.

Impact

On June 25th, 2024, Sansec published the following regarding the polyfill.io domain.

The polyfill.js is a popular open source library to support older browsers. 100K+ sites embed it using the cdn.polyfill.io domain... However, in February this year, a Chinese company bought the domain and the Github account. Since then, this domain was caught injecting malware on mobile devices via any site that embeds cdn.polyfill.io.

Therefore it was possible for users of legacy, pre-2017 browsers who navigate to a page serving fides.js to download and execute malicious scripts from the compromised domain.

Patches

The vulnerability has been patched in Fides version 2.39.1. Users are advised to upgrade to this version or later to secure their systems against this threat.

Workarounds

Prior to the domain level intervention, there were no server-side workarounds and the confidentiality, integrity, and availability impacts of this vulnerability were high.

References

https://sansec.io/research/polyfill-supply-chain-attack
https://github.com/ethyca/fides/pull/5026/
https://fetch.spec.whatwg.org/

Severity

0.0 (None)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N

Impacted products

Name	purl
ethyca-fides	pkg:pypi/ethyca-fides

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "ethyca-fides",
        "purl": "pkg:pypi/ethyca-fides"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.39.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.9",
        "2.0.0",
        "2.1.0",
        "2.10.0",
        "2.11.0",
        "2.12.0",
        "2.12.1",
        "2.13.0",
        "2.14.0",
        "2.14.1",
        "2.14.2",
        "2.15.0",
        "2.15.1",
        "2.16.0",
        "2.17.0",
        "2.17.1",
        "2.18.0",
        "2.19.0",
        "2.19.1",
        "2.2.0",
        "2.2.1",
        "2.2.2",
        "2.20.0",
        "2.20.1",
        "2.20.2",
        "2.21.0",
        "2.22.0",
        "2.22.1",
        "2.23.0",
        "2.23.1",
        "2.23.2",
        "2.23.3",
        "2.24.0",
        "2.24.1",
        "2.25.0",
        "2.26.0",
        "2.26.3",
        "2.27.0",
        "2.28.0",
        "2.29.0",
        "2.3.0",
        "2.3.1",
        "2.30.0",
        "2.30.1",
        "2.31.0",
        "2.32.0",
        "2.33.0",
        "2.33.1",
        "2.34.0",
        "2.35.0",
        "2.35.1",
        "2.36.0",
        "2.37.0",
        "2.38.0",
        "2.38.1",
        "2.39.0",
        "2.4.0",
        "2.5.0",
        "2.5.1",
        "2.6.0",
        "2.6.1",
        "2.6.2",
        "2.6.3",
        "2.6.4",
        "2.6.5",
        "2.6.6",
        "2.7.0",
        "2.7.1",
        "2.8.0",
        "2.8.1",
        "2.8.2",
        "2.8.3",
        "2.9.0",
        "2.9.1",
        "2.9.2"
      ]
    }
  ],
  "aliases": [
    "CVE-2024-38537",
    "GHSA-cvw4-c69g-7v7m"
  ],
  "details": "### Note\n\nOn Thursday, June 27, 2024, Cloudflare and Namecheap intervened at a domain level to ensure `polyfill.io` and its subdomains could not resolve to the compromised service, rendering this vulnerability **unexploitable**.\n\nThe following sections describe this vulnerability prior to the domain level intervention, when it was still exploitable.\n\n### Impact\n\n`fides.js`, a client-side script used to interact with the consent management features of Fides, used the `polyfill.io` domain in a very limited edge case, when it detected a legacy browser such as IE11 that did not support the fetch standard.\n\nOn June 25th, 2024, Sansec published the following regarding the `polyfill.io` domain.\n\n\u003e The polyfill.js is a popular open source library to support older browsers. 100K+ sites embed it using the cdn.polyfill.io domain... However, in February this year, a Chinese company bought the domain and the Github account. Since then, this domain was caught injecting malware on mobile devices via any site that embeds cdn.polyfill.io.\n\nTherefore it was possible for users of legacy, pre-2017 browsers who navigate to a page serving `fides.js` to download and execute malicious scripts from the compromised domain.\n\nNo exploitation of `fides.js` via `polyfill.io` has been identified at this time, but other script developers who use `https://cdn.polyfill.io/v2/polyfill.min.js` have reported redirects to malicious websites.\n\n### Patches\nThe vulnerability has been patched in Fides version `2.39.1`. Users are advised to upgrade to this version or later to secure their systems against this threat.\n\n### Workarounds\n\nPrior to the domain level intervention, there were no server-side workarounds and the confidentiality, integrity, and availability impacts of this vulnerability were high. \n\nClients could ensure they were not affected by using a modern browser that supported the fetch standard. caniuse.com/fetch estimates that 97.52% of browser users use a browser that supports the fetch standard.\n\n### References\n- https://sansec.io/research/polyfill-supply-chain-attack\n- https://github.com/ethyca/fides/pull/5026/\n- https://fetch.spec.whatwg.org/",
  "id": "PYSEC-2026-1339",
  "modified": "2026-07-07T17:24:05.465705Z",
  "published": "2026-07-07T14:34:36.222537Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ethyca/fides/security/advisories/GHSA-cvw4-c69g-7v7m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38537"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ethyca/fides/pull/5026"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ethyca/fides/commit/868c4d629760572192bd61db34f5a4458ed12005"
    },
    {
      "type": "WEB",
      "url": "https://fetch.spec.whatwg.org"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ethyca/fides"
    },
    {
      "type": "WEB",
      "url": "https://sansec.io/research/polyfill-supply-chain-attack"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/ethyca-fides"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-cvw4-c69g-7v7m"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Inclusion of Untrusted polyfill.io Code Vulnerability in fides.js"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2024-38537 (GCVE-0-2024-38537)

FKIE_CVE-2024-38537

GHSA-CVW4-C69G-7V7M

Note

Impact

Patches

Workarounds

References

PYSEC-2026-1339

Note

Impact

Patches

Workarounds

References

Tags

Sightings

Nomenclature

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