CVE-2026-79668: Missing Authentication for Critical Function in lin-snow Ech0
Description
Ech0 versions before 4.7.3 have an authentication bypass vulnerability in the PUT /api/echo/like/:id endpoint. This flaw allows unauthenticated attackers to increment engagement metrics without identity verification or rate limiting. Attackers can repeatedly send requests to inflate the fav_count field for any known echo identifier, undermining the integrity of engagement metrics and social ranking systems.
CVSS v4.0
Score 6.9medium
Affected software
lin-snow
Ech0
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-79668 describes an authentication bypass vulnerability in the Ech0 product by lin-snow, affecting versions prior to 4.7.3. The vulnerability exists in the PUT /api/echo/like/:id endpoint, which lacks proper authentication and rate limiting controls. This allows unauthenticated attackers to arbitrarily increment the fav_count field of any echo identifier, compromising the accuracy and trustworthiness of engagement metrics and social ranking data.
Potential Impact
The vulnerability allows unauthenticated attackers to manipulate engagement metrics by inflating the fav_count field without any identity verification or rate limiting. This compromises the integrity of social ranking systems and engagement data, potentially misleading users and stakeholders relying on these metrics.
Mitigation Recommendations
Upgrade Ech0 to version 4.7.3 or later, where this authentication bypass vulnerability has been fixed. No other mitigation details are provided. Patch status is confirmed by the affectedVersions field indicating versions before 4.7.3 are vulnerable.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-25T11:10:13.697Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a8d820eacd9273b49225442
Added to database: 08/25/2026, 11:52:46 UTC
Last enriched: 09/10/2026, 19:35:28 UTC
Last updated: 10/10/2026, 18:48:22 UTC
Views: 52
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