{"id":"CVE-2026-34148","state":"PUBLISHED","title":"Fedify affected by resource exhaustion caused by unbounded redirect following during remote key/document resolution","description":"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.","publishedAt":"2026-04-06T15:06:53.197Z","updatedAt":"2026-04-07T14:25:51.368Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["@fedify fedify","@fedify vocab-runtime"],"affected":[{"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"}]}],"references":["https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp","https://github.com/fedify-dev/fedify/releases/tag/1.10.5","https://github.com/fedify-dev/fedify/releases/tag/1.9.6","https://github.com/fedify-dev/fedify/releases/tag/2.0.8","https://github.com/fedify-dev/fedify/releases/tag/2.1.1"],"weaknesses":["CWE-400","CWE-770"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/34xxx/CVE-2026-34148.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34148","state":"PUBLISHED","datePublished":"2026-04-06T15:06:53.197Z","dateUpdated":"2026-04-07T14:25:51.368Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-25T20:12:04.195Z"},"containers":{"cna":{"title":"Fedify affected by resource exhaustion caused by unbounded redirect following during remote key/document resolution","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":[{"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"}]}],"references":[{"url":"https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp","name":"https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/fedify-dev/fedify/releases/tag/1.10.5","name":"https://github.com/fedify-dev/fedify/releases/tag/1.10.5","tags":["x_refsource_MISC"]},{"url":"https://github.com/fedify-dev/fedify/releases/tag/1.9.6","name":"https://github.com/fedify-dev/fedify/releases/tag/1.9.6","tags":["x_refsource_MISC"]},{"url":"https://github.com/fedify-dev/fedify/releases/tag/2.0.8","name":"https://github.com/fedify-dev/fedify/releases/tag/2.0.8","tags":["x_refsource_MISC"]},{"url":"https://github.com/fedify-dev/fedify/releases/tag/2.1.1","name":"https://github.com/fedify-dev/fedify/releases/tag/2.1.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-07T14:25:51.368Z"},"source":{"advisory":"GHSA-gm9m-gwc4-hwgp","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-06T15:35:17.193226Z","id":"CVE-2026-34148","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-06T15:35:21.840Z"}}]}}}