CVE-2026-79659

High

Description

Ech0 before 4.7.3 contains a server-side request forgery vulnerability in the fetchPeerConnectInfo function that uses unvalidated HTTP requests instead of safe request methods with URL validation. Authenticated attackers can supply arbitrary URLs to access internal services and cloud metadata endpoints by triggering connection health checks or peer connection operations.

SeverityHigh

CVSS7.7

Exploit probability—

ProductGithub.com/lin-snow/ech0

PublishedAug 25, 2026

First seenAug 25, 2026

Weakness typeCWE-918Server-side request forgery (SSRF)

How to fix

Update

github.com/lin-snow/ech01.4.8-0.20260503040602-091d26d2d942 or later

Vendor advisories

github.com/lin-snow/Ech0/security/advisories/GHSA-8mc6-xjpr-h98x

Affected products

Product	Affected versions	Fixed in
github.com/lin-snow/ech0Go	v < 1.4.8-0.20260503040602-091d26d2d942	1.4.8-0.20260503040602-091d26d2d942

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