Server-side Request Forgery (SSRF)

Overview @fedify/fedify is an An ActivityPub server framework Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the validatePublicUrl process. An attacker can access internal or otherwise restricted network resources by supplying specially crafted URLs that...

Server-side Request Forgery (SSRF)

Overview @fedify/vocab-runtime is a Runtime library for code-generated Activity Vocabulary APIs Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the validatePublicUrl process. An attacker can access internal or otherwise restricted network resources by...

CVE-2026-50131 Fedify has an incomplete SSRF mitigation after GHSA-p9cg-vqcc-grcx: validatePublicUrl allows special-use IPv4 ranges

Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Fedify previously addressed SSRF/internal network access in GHSA-p9cg-vqcc-grcx by adding public URL validation before runtime document and media fetching. However, the IPv4 validation logic present starting...