CVE-2026-62857

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{"affected": [{"affectedData": [{"product": "fedify", "vendor": "fedify-dev", "versions": [{"status": "affected", "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"}]}], "source": "security-advisories@github.com"}], "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 versi\u00f3n 1.2.0 hasta las l\u00edneas 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 validaci\u00f3n de esquema, redirecci\u00f3n o direcci\u00f3n 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 est\u00e1 solucionado en las versiones 1.9.13, 1.10.12, 2.0.22, 2.1.18, 2.2.7 y 2.3.2."}], "id": "CVE-2026-62857", "lastModified": "2026-10-24T16:10:00.153", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.8, "baseSeverity": "HIGH", "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": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-62857", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-08T02:39:56.206189Z", "version": "2.0.3"}}]}, "published": "2026-08-06T22:18:12.127", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/fedify-dev/fedify/releases/tag/2.3.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-hqph-j65v-8cq5"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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