{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/70655?format=json","vulnerability_id":"VCID-wpep-ax9c-jyb6","summary":"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.","aliases":[{"alias":"CVE-2026-42462"},{"alias":"GHSA-9rfg-v8g9-9367"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/41515?format=json","purl":"pkg:npm/%40fedify/fedify@1.9.11","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540fedify/fedify@1.9.11"},{"url":"http://public2.vulnerablecode.io/api/packages/41514?format=json","purl":"pkg:npm/%40fedify/fedify@1.10.10","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540fedify/fedify@1.10.10"},{"url":"http://public2.vulnerablecode.io/api/packages/41509?format=json","purl":"pkg:npm/%40fedify/fedify@2.0.18","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540fedify/fedify@2.0.18"},{"url":"http://public2.vulnerablecode.io/api/packages/41511?format=json","purl":"pkg:npm/%40fedify/fedify@2.1.14","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540fedify/fedify@2.1.14"},{"url":"http://public2.vulnerablecode.io/api/packages/41507?format=json","purl":"pkg:npm/%40fedify/fedify@2.2.3","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540fedify/fedify@2.2.3"}],"affected_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/41513?format=json","purl":"pkg:npm/%40fedify/fedify@1.10.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-wpep-ax9c-jyb6"},{"vulnerability":"VCID-yfms-12uu-a7hy"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540fedify/fedify@1.10.0"},{"url":"http://public2.vulnerablecode.io/api/packages/41508?format=json","purl":"pkg:npm/%40fedify/fedify@2.0.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-wpep-ax9c-jyb6"},{"vulnerability":"VCID-yfms-12uu-a7hy"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540fedify/fedify@2.0.0"},{"url":"http://public2.vulnerablecode.io/api/packages/41510?format=json","purl":"pkg:npm/%40fedify/fedify@2.1.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-wpep-ax9c-jyb6"},{"vulnerability":"VCID-yfms-12uu-a7hy"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540fedify/fedify@2.1.0"},{"url":"http://public2.vulnerablecode.io/api/packages/41506?format=json","purl":"pkg:npm/%40fedify/fedify@2.2.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-wpep-ax9c-jyb6"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/%2540fedify/fedify@2.2.0"}],"references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2026-42462","reference_id":"","reference_type":"","scores":[{"value":"0.00038","scoring_system":"epss","scoring_elements":"0.11786","published_at":"2026-06-12T12:55:00Z"},{"value":"0.00038","scoring_system":"epss","scoring_elements":"0.11781","published_at":"2026-06-13T12:55:00Z"},{"value":"0.00038","scoring_system":"epss","scoring_elements":"0.11701","published_at":"2026-06-11T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-42462"},{"reference_url":"https://github.com/fedify-dev/fedify","reference_id":"","reference_type":"","scores":[{"value":"7.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/fedify-dev/fedify"},{"reference_url":"https://github.com/fedify-dev/fedify/releases/tag/2.2.3","reference_id":"2.2.3","reference_type":"","scores":[{"value":"7","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L"},{"value":"7.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-06-11T13:31:40Z/"}],"url":"https://github.com/fedify-dev/fedify/releases/tag/2.2.3"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42462","reference_id":"CVE-2026-42462","reference_type":"","scores":[{"value":"7.0","scoring_system":"cvssv3.1","scoring_elements":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L"},{"value":"HIGH","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42462"},{"reference_url":"https://github.com/advisories/GHSA-9rfg-v8g9-9367","reference_id":"GHSA-9rfg-v8g9-9367","reference_type":"","scores":[{"value":"HIGH","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-9rfg-v8g9-9367"},{"reference_url":"https://github.com/fedify-dev/fedify/security/advisories/GHSA-9rfg-v8g9-9367","reference_id":"GHSA-9rfg-v8g9-9367","ref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Behavior Order: Validate Before Canonicalize","description":"The product validates input before it is canonicalized, which prevents the product from detecting data that becomes invalid after the canonicalization step."},{"cwe_id":347,"name":"Improper Verification of Cryptographic Signature","description":"The product does not verify, or incorrectly verifies, the cryptographic signature for data."},{"cwe_id":436,"name":"Interpretation Conflict","description":"Product A handles inputs or steps differently than Product B, which causes A to perform incorrect actions based on its perception of B's state."},{"cwe_id":1289,"name":"Improper Validation of Unsafe Equivalence in Input","description":"The product receives an input value that is used as a resource identifier or other type of reference, but it does not validate or incorrectly validates that the input is equivalent to a potentially-unsafe value."}],"exploits":[],"severity_range_score":"7.0 - 8.9","exploitability":"0.5","weighted_severity":"8.0","risk_score":4.0,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-wpep-ax9c-jyb6"}