CVE-2026-79668

Medium

Description

Ech0 before 4.7.3 contains an authentication bypass vulnerability in the PUT /api/echo/like/:id endpoint that allows unauthenticated attackers to increment engagement metrics without identity verification or rate limiting. Attackers can send repeated requests to arbitrarily inflate the fav_count field for any known echo identifier, compromising the integrity of engagement metrics and social ranking systems.

SeverityMedium

CVSS5.3

Exploit probability—

ProductGithub.com/lin-snow/ech0

PublishedAug 25, 2026

First seenAug 25, 2026

Weakness typeCWE-306Missing authentication for critical function

How to fix

Update

github.com/lin-snow/ech01.4.8-0.20260503040728-a7e8b8e84bd1 or later

Vendor advisories

github.com/lin-snow/Ech0/security/advisories/GHSA-rgj7-vg8v-j4wr

Affected products

Product	Affected versions	Fixed in
github.com/lin-snow/ech0Go	v < 1.4.8-0.20260503040728-a7e8b8e84bd1	1.4.8-0.20260503040728-a7e8b8e84bd1

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