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CVE-2026-34148

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/6/2026

Last Modified4/7/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-400CWE-770

References

https://github.com/fedify-dev/fedify/releases/tag/1.10.5(security-advisories@github.com)

https://github.com/fedify-dev/fedify/releases/tag/1.9.6(security-advisories@github.com)

https://github.com/fedify-dev/fedify/releases/tag/2.0.8(security-advisories@github.com)

https://github.com/fedify-dev/fedify/releases/tag/2.1.1(security-advisories@github.com)

https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp(security-advisories@github.com)

https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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