MEDIUM 5.1 NVD
CVE-2026-79671
Ech0 through 4.2.1 contains a server-side request forgery vulnerability in the validateWebhookURL function (webhook_setting_service.go), which only validates li
Ech0 through 4.2.1 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.
References
- https://github.com/lin-snow/Ech0/security/advisories/GHSA-r2x7-427f-rq69
- https://www.vulncheck.com/advisories/ech0-before-ssrf-via-dns-resolution-bypass
This medium severity vulnerability with a CVSS score of 5.1 was published on 2026-08-25 via NVD.
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