CVEvulnerability

CVE-2026-71250

4.3 MEDIUM Published 2026-08-05 Modified 2026-08-26 Official page ↗
Status
Deferred
Published
2026-08-05
Last modified
2026-08-26
Assigner
309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
CVSS 3.1 (309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c)
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weaknesses
CWE-918

Description

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 enabled, which is off by default) to configure a webhook targeting loopback services on the server.

Related

Weakness · CWE (1)

  • CWE-918 Server-Side Request Forgery weakness

References