SSRF in Firefly-iii
CVE-2026-71250
Firefly III's webhook URL validator (IsValidWebhookUrl.php) filters most private/reserved IPv4 ranges but contains an explicit early-return that allows any resolved address in 127.0.0.0/8, permitting an authenticated user (with webhooks en…
Vulnerability class: SSRF (Server-Side Request Forgery)
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Firefly-iii — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-71250?
- CVE-2026-71250 is a medium-severity vulnerability in Firefly-iii, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.3/10. Published 2026-08-05.
- How severe is CVE-2026-71250?
- Medium severity. CVSS v3 base score is 4.3 out of 10.