CVE-2026-79668

Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation

MEDIUM
5.3
CVSS Score
Published: August 25, 2026 at 11:33 AM UTC
Updated: August 31, 2026 at 08:56 PM UTC
1 product affected across 1 vendorEch0

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.7.3
Vendor states this is fixed in 4.7.3 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-306

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