CVE-2026-62857

{
  "id": "CVE-2026-62857",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-06T22:18:12.127",
  "lastModified": "2026-10-24T16:10:00.153",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Fedify is a TypeScript library for building federated server apps powered by ActivityPub. From version 1.2.0 through the affected 1.9, 1.10, 2.0, 2.1, 2.2, and 2.3 maintenance lines, getNodeInfo() follows an attacker-controlled links[].href value from /.well-known/nodeinfo without scheme, redirect, or private-address validation, allowing requests to loopback, link-local, cloud metadata, and private-network services and returning their response bodies. This issue is fixed in versions 1.9.13, 1.10.12, 2.0.22, 2.1.18, 2.2.7, and 2.3.2."
    },
    {
      "lang": "es",
      "value": "Fedify es una biblioteca TypeScript para construir aplicaciones de servidor federadas impulsadas por ActivityPub. Desde la versión 1.2.0 hasta las líneas de mantenimiento afectadas 1.9, 1.10, 2.0, 2.1, 2.2 y 2.3, getNodeInfo() sigue un valor links[].href controlado por el atacante desde /.well-known/nodeinfo sin validación de esquema, redirección o dirección privada, permitiendo solicitudes a servicios de loopback, link-local, metadatos en la nube y de red privada y devolviendo sus cuerpos de respuesta. Este problema está solucionado en las versiones 1.9.13, 1.10.12, 2.0.22, 2.1.18, 2.2.7 y 2.3.2."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "fedify-dev",
          "product": "fedify",
          "versions": [
            {
              "version": ">= 1.2.0, < 1.9.13",
              "status": "affected"
            },
            {
              "version": ">= 1.10.0, < 1.10.12",
              "status": "affected"
            },
            {
              "version": ">= 2.0.0, < 2.0.22",
              "status": "affected"
            },
            {
              "version": ">= 2.1.0, < 2.1.18",
              "status": "affected"
            },
            {
              "version": ">= 2.2.0, < 2.2.7",
              "status": "affected"
            },
            {
              "version": ">= 2.3.0, < 2.3.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/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": 8.8,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnAvailabilityImpact": "LOW",
          "subConfidentialityImpact": "NONE",
          "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"
        }
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-08T02:39:56.206189Z",
          "id": "CVE-2026-62857",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/fedify-dev/fedify/releases/tag/2.3.2",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}