SSRF in Fedify-dev Fedify
CVE-2026-50131
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 fet…
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.004 (27.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L.
Affected products
- Fedify-dev Fedify — versions >= 0.11.2, < 1.9.12, >= 1.10.0, < 1.10.11, >= 2.0.0, < 2.0.19
- Fedify-dev Vocab-runtime — versions < 2.0.19, >= 2.1.0, < 2.1.15, >= 2.2.0, < 2.2.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-50131?
- CVE-2026-50131 is a high-severity vulnerability in Fedify-dev Fedify, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.6/10. Published 2026-06-10.
- How severe is CVE-2026-50131?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2026-50131 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.