High 7.5Published Apr 6, 2026

CVE-2026-34148Fedify is a TypeScript library for building federated server apps powered by ActivityPub.

Updated under an hour ago (2026-10-19 07:00 UTC)

Does this affect you?

It affects fedify/fedify and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for fedify/fedify

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400, CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

fedify fedify/fedify 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	NVD
fedify fedify/vocab-runtime fedify:fedify/vocab-runtime	before 2.0.8; from 2.1.0 before 2.1.1	NVD

References

https://github.com/fedify-dev/fedify/releases/tag/1.10.5release-notes
https://github.com/fedify-dev/fedify/releases/tag/1.9.6release-notes
https://github.com/fedify-dev/fedify/releases/tag/2.0.8release-notes
https://github.com/fedify-dev/fedify/releases/tag/2.1.1release-notes
https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgpexploit, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.