https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Thu, 08 Oct 2026 16:07:13 +0000 https://cve.radiocsirt.org/vuln/euvd-2026-211153 EUVD-2026-211153 https://cve.radiocsirt.org/vuln/euvd-2026-211153 https://cve.radiocsirt.org/vuln/fkie_cve-2025-23221 <p>Fedify is a TypeScript library for building federated server apps powered by ActivityPub and other standards. This vulnerability allows a user to maneuver the Webfinger mechanism to perform a GET request to any internal resource on any Host, Port, URL combination regardless of present security mechanisms, and forcing the victim’s server into an infinite loop causing Denial of Service. Moreover, this issue can also be maneuvered into performing a Blind SSRF attack. This vulnerability is fixed in 1.0.14, 1.1.11, 1.2.11, and 1.3.4.</p> <p>Fedify is a TypeScript library for building federated server apps powered by ActivityPub and other standards. This vulnerability allows a user to maneuver the Webfinger mechanism to perform a GET request to any internal resource on any Host, Port, URL combination regardless of present security mechanisms, and forcing the victim’s server into an infinite loop causing Denial of Service. Moreover, this issue can also be maneuvered into performing a Blind SSRF attack. This vulnerability is fixed in 1.0.14, 1.1.11, 1.2.11, and 1.3.4.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2025-23221 https://cve.radiocsirt.org/vuln/ghsa-c59p-wq67-24wx <p><strong>Affected:</strong> npm: @fedify/fedify</p> <p>### Summary This vulnerability allows a user to maneuver the Webfinger mechanism to perform a GET request to any internal resource on any Host, Port, URL combination regardless of present security mechanisms, and forcing the victim’s server into an infinite loop causing Denial of Service. Moreover, this issue can also be maneuvered into performing a Blind SSRF attack.</p> <p>### Details The Webfinger endpoint takes a remote domain for checking accounts as a feature, however, as per the ActivityPub spec (https://www.w3.org/TR/activitypub/#security-considerations), on the security considerations section at B.3, access to Localhost services should be prevented while running in production.</p> <p>The **lookupWebFinger** function, responsible for returning an actor handler for received actor objects from a remote server, can be abused to perform a Denial of Service (DoS) and Blind SSRF attacks while attempting to resolve a malicious actor’s object. On Fedify, two client-facing functions implement the **lookupWebFinger** function- **getActorHandle**, and **lookupObject**, which are both used as a wrapper for the vulnerable lookup function. As the **lookupObject** function is implemented only for CLI usage, we won’t focus our PoC and explanation on it, but it is still vulnerable in the same way **getActorHandle** is.</p> <p>The **getActorHandle** function is a wrapper function for the **getActorHandleInternal** function (both present at _/src/vocab/actor.ts_): ```javascript async function getActorHa…</p> <p><strong>Affected:</strong> npm: @fedify/fedify</p> <p>### Summary This vulnerability allows a user to maneuver the Webfinger mechanism to perform a GET request to any internal resource on any Host, Port, URL combination regardless of present security mechanisms, and forcing the victim’s server into an infinite loop causing Denial of Service. Moreover, this issue can also be maneuvered into performing a Blind SSRF attack.</p> <p>### Details The Webfinger endpoint takes a remote domain for checking accounts as a feature, however, as per the ActivityPub spec (https://www.w3.org/TR/activitypub/#security-considerations), on the security considerations section at B.3, access to Localhost services should be prevented while running in production.</p> <p>The **lookupWebFinger** function, responsible for returning an actor handler for received actor objects from a remote server, can be abused to perform a Denial of Service (DoS) and Blind SSRF attacks while attempting to resolve a malicious actor’s object. On Fedify, two client-facing functions implement the **lookupWebFinger** function- **getActorHandle**, and **lookupObject**, which are both used as a wrapper for the vulnerable lookup function. As the **lookupObject** function is implemented only for CLI usage, we won’t focus our PoC and explanation on it, but it is still vulnerable in the same way **getActorHandle** is.</p> <p>The **getActorHandle** function is a wrapper function for the **getActorHandleInternal** function (both present at _/src/vocab/actor.ts_): ```javascript async function getActorHa…</p> https://cve.radiocsirt.org/vuln/ghsa-c59p-wq67-24wx