{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42462","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-04-27T13:55:58.694Z","datePublished":"2026-06-10T20:22:35.383Z","dateUpdated":"2026-06-11T13:34:03.443Z"},"containers":{"cna":{"title":"Fedify has an LD-Signature Bypass via JSON-LD Named-Graph Restructuring","problemTypes":[{"descriptions":[{"cweId":"CWE-180","lang":"en","description":"CWE-180: Incorrect Behavior Order: Validate Before Canonicalize","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-347","lang":"en","description":"CWE-347: Improper Verification of Cryptographic Signature","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-436","lang":"en","description":"CWE-436: Interpretation Conflict","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-1289","lang":"en","description":"CWE-1289: Improper Validation of Unsafe Equivalence in Input","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7,"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"}}],"references":[{"name":"https://github.com/fedify-dev/fedify/security/advisories/GHSA-9rfg-v8g9-9367","tags":["x_refsource_CONFIRM"],"url":"https://github.com/fedify-dev/fedify/security/advisories/GHSA-9rfg-v8g9-9367"},{"name":"https://github.com/fedify-dev/fedify/releases/tag/2.2.3","tags":["x_refsource_MISC"],"url":"https://github.com/fedify-dev/fedify/releases/tag/2.2.3"}],"affected":[{"vendor":"fedify-dev","product":"fedify","versions":[{"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","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-06-10T20:22:35.383Z"},"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."}],"source":{"advisory":"GHSA-9rfg-v8g9-9367","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-11T13:31:40.827057Z","id":"CVE-2026-42462","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-11T13:34:03.443Z"}}]}}