FKIE_CVE-2026-34148

Vulnerability from fkie_nvd - Published: 2026-04-06 16:16 - Updated: 2026-10-26 22:10
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to 1.9.6, 1.10.5, 2.0.8, and 2.1.1, @fedify/fedify follows HTTP redirects recursively in its remote document loader and authenticated document loader without enforcing a maximum redirect count or visited-URL loop detection. An attacker who controls a remote ActivityPub key or actor URL can force a server using Fedify to make repeated outbound requests from a single inbound request, leading to resource consumption and denial of service. This vulnerability is fixed in 1.9.6, 1.10.5, 2.0.8, and 2.1.1.
References
security-advisories@github.comhttps://github.com/fedify-dev/fedify/releases/tag/1.10.5Release Notes
security-advisories@github.comhttps://github.com/fedify-dev/fedify/releases/tag/1.9.6Release Notes
security-advisories@github.comhttps://github.com/fedify-dev/fedify/releases/tag/2.0.8Release Notes
security-advisories@github.comhttps://github.com/fedify-dev/fedify/releases/tag/2.1.1Release Notes
security-advisories@github.comhttps://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgpExploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgpExploit, Vendor Advisory
Impacted products
Vendor Product Version
fedify fedify\/fedify *
fedify fedify\/fedify *
fedify fedify\/fedify *
fedify fedify\/fedify *
fedify fedify\/vocab-runtime *
fedify fedify\/vocab-runtime *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "fedify",
          "vendor": "@fedify",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.9.6"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.10.0, \u003c 1.10.5"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.0.0, \u003c 2.0.8"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.1.0, \u003c 2.1.1"
            }
          ]
        },
        {
          "product": "vocab-runtime",
          "vendor": "@fedify",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.0.8"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.1.0, \u003c 2.1.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:fedify:fedify\\/fedify:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "ECF8706E-2E6C-4A6A-8F8C-DE9933F39224",
              "versionEndExcluding": "1.9.6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fedify:fedify\\/fedify:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "BF4917D5-C6AA-45E3-B5F6-B3DCEF460212",
              "versionEndExcluding": "1.10.5",
              "versionStartIncluding": "1.10.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fedify:fedify\\/fedify:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "DD7D6EB1-0E97-43AE-9412-FA558F8FFA6B",
              "versionEndExcluding": "2.0.8",
              "versionStartIncluding": "2.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:fedify:fedify\\/fedify:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "0613E25B-2982-4E31-A7FB-5FF0F10FA724",
              "versionEndExcluding": "2.1.1",
              "versionStartIncluding": "2.1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:fedify:fedify\\/vocab-runtime:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "C298320F-CF10-4C9F-B8B5-F96ACDBFA963",
              "versionEndExcluding": "2.0.8",
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            },
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              "criteria": "cpe:2.3:a:fedify:fedify\\/vocab-runtime:*:*:*:*:*:node.js:*:*",
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            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to 1.9.6, 1.10.5, 2.0.8, and 2.1.1, @fedify/fedify follows HTTP redirects recursively in its remote document loader and authenticated document loader without enforcing a maximum redirect count or visited-URL loop detection. An attacker who controls a remote ActivityPub key or actor URL can force a server using Fedify to make repeated outbound requests from a single inbound request, leading to resource consumption and denial of service. This vulnerability is fixed in 1.9.6, 1.10.5, 2.0.8, and 2.1.1."
    },
    {
      "lang": "es",
      "value": "Fedify es una biblioteca TypeScript para construir aplicaciones de servidor federadas impulsadas por ActivityPub. Antes de 1.9.6, 1.10.5, 2.0.8 y 2.1.1, @fedify/fedify sigue las redirecciones HTTP recursivamente en su cargador de documentos remoto y cargador de documentos autenticado sin aplicar un recuento m\u00e1ximo de redirecciones o detecci\u00f3n de bucles de URL visitadas. Un atacante que controla una clave ActivityPub remota o una URL de actor puede forzar a un servidor que usa Fedify a realizar repetidas solicitudes salientes a partir de una \u00fanica solicitud entrante, lo que lleva al consumo de recursos y a la denegaci\u00f3n de servicio. Esta vulnerabilidad est\u00e1 corregida en 1.9.6, 1.10.5, 2.0.8 y 2.1.1."
    }
  ],
  "id": "CVE-2026-34148",
  "lastModified": "2026-10-26T22:10:00.163",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "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:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34148",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-06T15:35:17.193226Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-06T16:16:34.387",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/fedify-dev/fedify/releases/tag/1.10.5"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/fedify-dev/fedify/releases/tag/1.9.6"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
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      "url": "https://github.com/fedify-dev/fedify/releases/tag/2.0.8"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/fedify-dev/fedify/releases/tag/2.1.1"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
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        "Vendor Advisory"
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      "url": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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