{"id":"CVE-2026-34148","sourceIdentifier":"security-advisories@github.com","published":"2026-04-06T16:16:34.387","lastModified":"2026-06-17T10:38:34.750","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to 1.9.6, 1.10.5, 2.0.8, and 2.1.1, @fedify/fedify follows HTTP redirects recursively in its remote document loader and authenticated document loader without enforcing a maximum redirect count or visited-URL loop detection. An attacker who controls a remote ActivityPub key or actor URL can force a server using Fedify to make repeated outbound requests from a single inbound request, leading to resource consumption and denial of service. This vulnerability is fixed in 1.9.6, 1.10.5, 2.0.8, and 2.1.1."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"@fedify","product":"fedify","versions":[{"version":"< 1.9.6","status":"affected"},{"version":">= 1.10.0, < 1.10.5","status":"affected"},{"version":">= 2.0.0, < 2.0.8","status":"affected"},{"version":">= 2.1.0, < 2.1.1","status":"affected"}]},{"vendor":"@fedify","product":"vocab-runtime","versions":[{"version":"< 2.0.8","status":"affected"},{"version":">= 2.1.0, < 2.1.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-04-06T15:35:17.193226Z","id":"CVE-2026-34148","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-400"},{"lang":"en","value":"CWE-770"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:fedify:fedify\\/fedify:*:*:*:*:*:node.js:*:*","versionEndExcluding":"1.9.6","matchCriteriaId":"ECF8706E-2E6C-4A6A-8F8C-DE9933F39224"},{"vulnerable":true,"criteria":"cpe:2.3:a:fedify:fedify\\/fedify:*:*:*:*:*:node.js:*:*","versionStartIncluding":"1.10.0","versionEndExcluding":"1.10.5","matchCriteriaId":"BF4917D5-C6AA-45E3-B5F6-B3DCEF460212"},{"vulnerable":true,"criteria":"cpe:2.3:a:fedify:fedify\\/fedify:*:*:*:*:*:node.js:*:*","versionStartIncluding":"2.0.0","versionEndExcluding":"2.0.8","matchCriteriaId":"DD7D6EB1-0E97-43AE-9412-FA558F8FFA6B"},{"vulnerable":true,"criteria":"cpe:2.3:a:fedify:fedify\\/fedify:*:*:*:*:*:node.js:*:*","versionStartIncluding":"2.1.0","versionEndExcluding":"2.1.1","matchCriteriaId":"0613E25B-2982-4E31-A7FB-5FF0F10FA724"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:fedify:fedify\\/vocab-runtime:*:*:*:*:*:node.js:*:*","versionEndExcluding":"2.0.8","matchCriteriaId":"C298320F-CF10-4C9F-B8B5-F96ACDBFA963"},{"vulnerable":true,"criteria":"cpe:2.3:a:fedify:fedify\\/vocab-runtime:*:*:*:*:*:node.js:*:*","versionStartIncluding":"2.1.0","versionEndExcluding":"2.1.1","matchCriteriaId":"B6CC76BF-8504-4630-832A-F5EA09191546"}]}]}],"references":[{"url":"https://github.com/fedify-dev/fedify/releases/tag/1.10.5","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/fedify-dev/fedify/releases/tag/1.9.6","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/fedify-dev/fedify/releases/tag/2.0.8","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/fedify-dev/fedify/releases/tag/2.1.1","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]},{"url":"https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Vendor Advisory"]}]}