Vulnerability Details CVE-2026-34148
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 17.9%
CVSS Severity
CVSS v3 Score 7.5
References
- 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
- https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp
- https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp
Products affected by CVE-2026-34148
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cpe:2.3:a:fedify:fedify/fedify:*
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cpe:2.3:a:fedify:fedify/vocab-runtime:*