CVE-2026-34148
Fedify affected by resource exhaustion caused by unbounded redirect following during remote key/document resolution
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
12th
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.
| CWE | CWE-400 CWE-770 |
| Vendor | @fedify |
| Product | fedify |
| Published | Apr 6, 2026 |
| Last Updated | Apr 7, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
@fedify / fedify
< 1.9.6 >= 1.10.0, < 1.10.5 >= 2.0.0, < 2.0.8 >= 2.1.0, < 2.1.1
@fedify / vocab-runtime
< 2.0.8 >= 2.1.0, < 2.1.1
References
github.com: https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp github.com: https://github.com/fedify-dev/fedify/releases/tag/1.10.5 github.com: https://github.com/fedify-dev/fedify/releases/tag/1.9.6 github.com: https://github.com/fedify-dev/fedify/releases/tag/2.0.8 github.com: https://github.com/fedify-dev/fedify/releases/tag/2.1.1