CVE-2026-34148
Fedify affected by resource exhaustion caused by unbounded redirect following during remote key/document resolution
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.
INFO
Published Date :
April 6, 2026, 4:16 p.m.
Last Modified :
April 25, 2026, 6:03 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-34148
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE |
Solution
- Update Fedify to version 1.9.6 or later.
- Update Fedify to version 1.10.5 or later.
- Update Fedify to version 2.0.8 or later.
- Update Fedify to version 2.1.1 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34148.
| URL | Resource |
|---|---|
| https://github.com/fedify-dev/fedify/releases/tag/1.10.5 | Release Notes |
| https://github.com/fedify-dev/fedify/releases/tag/1.9.6 | Release Notes |
| https://github.com/fedify-dev/fedify/releases/tag/2.0.8 | Release Notes |
| https://github.com/fedify-dev/fedify/releases/tag/2.1.1 | Release Notes |
| https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp | Exploit Vendor Advisory |
| https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34148 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34148
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34148 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-34148 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Reanalysis by [email protected]
Apr. 25, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:fedify:fedify/vocab-runtime:*:*:*:*:*:node.js:*:* versions up to (excluding) 2.0.8 *cpe:2.3:a:fedify:fedify/vocab-runtime:*:*:*:*:*:node.js:*:* versions from (including) 2.1.0 up to (excluding) 2.1.1 Changed CPE Configuration OR *cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:* versions up to (including) 1.9.5 *cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:* versions from (including) 1.10.6 up to (including) 2.0.7 *cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:* versions from (including) 1.9.7 up to (including) 1.10.4 *cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:* versions from (including) 2.0.9 up to (including) 2.1.0 *cpe:2.3:a:fedify:vocab-runtime:2.1.0:*:*:*:*:*:*:* *cpe:2.3:a:fedify:vocab-runtime:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.8 OR *cpe:2.3:a:fedify:fedify/fedify:*:*:*:*:*:node.js:*:* versions up to (excluding) 1.9.6 *cpe:2.3:a:fedify:fedify/fedify:*:*:*:*:*:node.js:*:* versions from (including) 1.10.0 up to (excluding) 1.10.5 *cpe:2.3:a:fedify:fedify/fedify:*:*:*:*:*:node.js:*:* versions from (including) 2.0.0 up to (excluding) 2.0.8 *cpe:2.3:a:fedify:fedify/fedify:*:*:*:*:*:node.js:*:* versions from (including) 2.1.0 up to (excluding) 2.1.1 -
Initial Analysis by [email protected]
Apr. 14, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:* versions up to (including) 1.9.5 *cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:* versions from (including) 1.10.6 up to (including) 2.0.7 *cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:* versions from (including) 1.9.7 up to (including) 1.10.4 *cpe:2.3:a:fedify:fedify:*:*:*:*:*:*:*:* versions from (including) 2.0.9 up to (including) 2.1.0 *cpe:2.3:a:fedify:vocab-runtime:2.1.0:*:*:*:*:*:*:* *cpe:2.3:a:fedify:vocab-runtime:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.8 Added Reference Type GitHub, Inc.: https://github.com/fedify-dev/fedify/releases/tag/1.10.5 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/fedify-dev/fedify/releases/tag/1.9.6 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/fedify-dev/fedify/releases/tag/2.0.8 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/fedify-dev/fedify/releases/tag/2.1.1 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp Types: Exploit, Vendor Advisory -
CVE Modified by [email protected]
Apr. 07, 2026
Action Type Old Value New Value Added Reference https://github.com/fedify-dev/fedify/releases/tag/1.10.5 Added Reference https://github.com/fedify-dev/fedify/releases/tag/1.9.6 Added Reference https://github.com/fedify-dev/fedify/releases/tag/2.0.8 Added Reference https://github.com/fedify-dev/fedify/releases/tag/2.1.1 -
New CVE Received by [email protected]
Apr. 06, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-400 Added CWE CWE-770 Added Reference https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 06, 2026
Action Type Old Value New Value Added Reference https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp