CVE-2026-50131
SSRF bypass in Fedify due to incomplete IPv4 validation, enabling internal resource fetches.
Is CVE-2026-50131 being exploited?
Not confirmed. CVE-2026-50131 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-50131?
CVE-2026-50131 is rated High with a CVSS score of 8.6. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-50131?
Yes. A fix has been recorded for CVE-2026-50131. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-50131 affect?
CVE-2026-50131 affects Fedify Node.js library, Versions < 1.9.12, Version 1.10.11, Version 2.0.19, and 2 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-50131?
Upgrade to patched Fedify versions (≥1.9.12 or ≥2.2.4).
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
SSRF to internal networks via outbound fetches; may access internal services.
Patch when possible
- affected>= 0.11.2 and < 1.9.12
- affected>= 1.10.0 and < 1.10.11
- affected>= 2.0.0 and < 2.0.19
- affected>= 2.1.0 and < 2.1.15
- affected>= 2.2.0 and < 2.2.4
- affected< 2.0.19
- affected>= 2.1.0 and < 2.1.15
- affected>= 2.2.0 and < 2.2.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.