CVE-2026-42462

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{"affected": [{"affectedData": [{"product": "fedify", "vendor": "fedify-dev", "versions": [{"status": "affected", "version": ">= 2.2.0, < 2.2.3"}, {"status": "affected", "version": ">= 2.1.0, < 2.1.14"}, {"status": "affected", "version": ">= 2.0.0, < 2.0.18"}, {"status": "affected", "version": ">= 1.10.0, < 1.10.10"}, {"status": "affected", "version": "< 1.9.11"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to versions 1.9.11, 1.10.10, 2.0.18, 2.1.14, and 2.2.3, an attacker can make use of JSON-LD features to restructure a JSON-LD document that would change how Fedify interprets it without changing its Linked Data Signature, allowing them to alter a third-party signed activity they have received. Versions 1.9.11, 1.10.10, 2.0.18, 2.1.14, and 2.2.3 fix the issue."}, {"lang": "es", "value": "Fedify es una biblioteca TypeScript para construir aplicaciones de servidor federadas impulsadas por ActivityPub. Antes de las versiones 1.9.11, 1.10.10, 2.0.18, 2.1.14 y 2.2.3, un atacante puede hacer uso de las caracter\u00edsticas de JSON-LD para reestructurar un documento JSON-LD que cambiar\u00eda c\u00f3mo Fedify lo interpreta sin cambiar su Firma de Datos Enlazados, permiti\u00e9ndoles alterar una actividad firmada por terceros que hayan recibido. Las versiones 1.9.11, 1.10.10, 2.0.18, 2.1.14 y 2.2.3 solucionan el problema."}], "id": "CVE-2026-42462", "lastModified": "2026-07-23T09:10:00.113", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 4.7, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42462", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-11T13:31:40.827057Z", "version": "2.0.3"}}]}, "published": "2026-06-10T22:16:57.387", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/fedify-dev/fedify/releases/tag/2.2.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/fedify-dev/fedify/security/advisories/GHSA-9rfg-v8g9-9367"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-180"}, {"lang": "en", "value": "CWE-347"}, {"lang": "en", "value": "CWE-436"}, {"lang": "en", "value": "CWE-1289"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.2.0,2.2.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.1.0,2.1.14)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.0.0,2.0.18)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.10.0,1.10.10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.9.11)"}}], "enrichment": {"confidence": 87.0, "confidence_source": "matching", "scores": [{"score": 87.0, "source": "matching"}]}, "original": {"product": "fedify", "source": "cna", "vendor": "fedify-dev"}, "product": "fedify", "vendor": "fedify"}], "created": "2026-06-10T23:00:20.871042+00:00", "updated": "2026-06-11T10:30:11.842186+00:00", "vendors": ["fedify", "fedify$PRODUCT$fedify"]}