{"id":"CVE-2026-34148","aliases":["GHSA-gm9m-gwc4-hwgp"],"url":"https://o3.security/vulnerability/CVE-2026-34148","summary":"Fedify affected by resource exhaustion caused by unbounded redirect following during remote key/document resolution","details":"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.","published":"2026-04-06T15:06:53.197Z","modified":"2026-08-07T11:50:57.517470254Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@fedify/fedify","fixedVersion":"1.9.6"},{"ecosystem":"npm","name":"@fedify/vocab-runtime","fixedVersion":"2.0.8"},{"ecosystem":"npm","name":"@fedify/vocab-runtime","fixedVersion":"2.1.1"},{"ecosystem":"npm","name":"@fedify/fedify","fixedVersion":"1.10.5"},{"ecosystem":"npm","name":"@fedify/fedify","fixedVersion":"2.0.8"},{"ecosystem":"npm","name":"@fedify/fedify","fixedVersion":"2.1.1"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/fedify-dev/fedify/releases/tag/1.10.5"},{"type":"WEB","url":"https://github.com/fedify-dev/fedify/releases/tag/1.9.6"},{"type":"WEB","url":"https://github.com/fedify-dev/fedify/releases/tag/2.0.8"},{"type":"WEB","url":"https://github.com/fedify-dev/fedify/releases/tag/2.1.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34148.json"},{"type":"ADVISORY","url":"https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34148"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:50:57.517470254Z"}}