Server-side Request Forgery (SSRF) Affecting github.com/lin-snow/ech0/internal/util/http package, versions <4.4.3


Severity

Recommended
0.0
high
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept

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  • Snyk IDSNYK-GOLANG-GITHUBCOMLINSNOWECH0INTERNALUTILHTTP-16321066
  • published29 Apr 2026
  • disclosed10 Apr 2026
  • creditoffset

Introduced: 10 Apr 2026

New CVE NOT AVAILABLE CWE-918  (opens in a new tab)

How to fix?

Upgrade github.com/lin-snow/Ech0/internal/util/http to version 4.4.3 or higher.

Overview

Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via the validateWebhookURL function. An administrator can access internal network resources and cloud metadata endpoints by submitting webhook URLs that use hostnames resolving to private IP addresses, bypassing intended IP address restrictions. This can lead to exposure of sensitive information and internal network mapping.

CVSS Base Scores

version 4.0
version 3.1