high7.5
CVE-2026-34148
Fedify affected by resource exhaustion caused by unbounded redirect following during remote key/document resolution
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @fedify/fedify | < 1.9.6 | 1.9.6 |
| npm | @fedify/vocab-runtime | < 2.0.8 | 2.0.8 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Fedify | Fedify\/Fedify | before 1.9.6 from 1.10.0 before 1.10.5 from 2.0.0 before 2.0.8 from 2.1.0 before 2.1.1 |
| Fedify | Fedify\/Vocab-Runtime | before 2.0.8 from 2.1.0 before 2.1.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- 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/advisories/GHSA-gm9m-gwc4-hwgp
- https://nvd.nist.gov/vuln/detail/CVE-2026-34148