{
  "affected": [
    {
      "affectedData": [
        {
          "product": "misskey",
          "vendor": "misskey-dev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2026.6.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Misskey is an open source, federated social media platform. Prior to 2026.6.0, Misskey contains a Server-Side Request Forgery (SSRF) vulnerability in URL preview functionality in UrlPreviewService. Due to missing network restrictions before establishing outbound connections, a remote attacker can cause the Misskey server to initiate HTTP requests to loopback, private, or link-local services. Because IP address validation takes place after the request has been sent and the process is subsequently rejected, no sensitive internal data is believed to be transmitted back or exposed to the attacker. This issue is fixed in version 2026.6.0."
    },
    {
      "lang": "es",
      "value": "Misskey es una plataforma de redes sociales de c\u00f3digo abierto y federada. Antes de la versi\u00f3n 2026.6.0, Misskey contiene una vulnerabilidad de falsificaci\u00f3n de petici\u00f3n del lado del servidor (SSRF) en la funcionalidad de vista previa de URL en UrlPreviewService. Debido a la falta de restricciones de red antes de establecer conexiones salientes, un atacante remoto puede hacer que el servidor de Misskey inicie peticiones HTTP a servicios de bucle invertido, privados o de enlace local. Debido a que la validaci\u00f3n de la direcci\u00f3n IP tiene lugar despu\u00e9s de que la petici\u00f3n ha sido enviada y el proceso es posteriormente rechazado, no se cree que se transmitan datos internos sensibles de vuelta o se expongan al atacante. Este problema est\u00e1 solucionado en la versi\u00f3n 2026.6.0."
    }
  ],
  "id": "CVE-2026-57575",
  "lastModified": "2026-10-25T15:10:00.147",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.9,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "LOW",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-57575",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-14T14:08:02.805645Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-10T21:16:59.820",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/misskey-dev/misskey/commit/1eac4ccf513a067b9f7b7d123057c09a389fccee"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/misskey-dev/misskey/releases/tag/2026.6.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/misskey-dev/misskey/security/advisories/GHSA-jvcx-f39m-5xrj"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}