CVE-2026-79671 — Ech0 before 4.4.3 SSRF via DNS Resolution Bypass
Ech0 before 4.4.3 contains a server-side request forgery vulnerability in the validateWebhookURL function (webhook_setting_service.go), which only validates literal IP addresses…
Published: 2026-08-25 · CVSS: 5.1 · CVSS 4.0
Ech0 before 4.4.3 contains a server-side request forgery vulnerability in the validateWebhookURL function (webhook_setting_service.go), which only validates literal IP addresses via net.ParseIP() and fails to reject hostnames that DNS-resolve to private or internal IPs (e.g., 169.254.169.254.nip.io). An attacker with admin privileges can create a webhook with such a hostname to bypass validation and cause the server to make requests to internal services, cloud metadata endpoints, and private network resources. The issue is fixed in 4.4.3.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7