CVE-2026-79668 json
Ech0 before 4.7.3 Unauthenticated Like Endpoint Metric Inflation
published 2026-05-07 6 mo ago modified 2026-08-31 2 mo ago also GHSA-rgj7-vg8v-j4wr , GO-2026-5623 , EUVD-2026-65446
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 37%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/lin-snow/ech0 1.4.8-0.20260503040728-a7e8b8e84bd1
- lin-snow Ech0 4.7.3
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/lin-snow/ech0 | <1.4.8-0.20260503040728-a7e8b8e84bd1 |
1.4.8-0.20260503040728-a7e8b8e84bd1 |
Affected products
- lin-snow Ech0
Classification
References
-
github.com
/lin-snow/Ech0/commit/a7e8b8e84bd1e3db090dfb720f2c6c433356b442
web
-
github.com
/lin-snow/Ech0/security/advisories/GHSA-rgj7-vg8v-j4wr
vendor-advisory, web, advisory
-
vulncheck.com
/advisories/ech0-before-unauthenticated-like-endpoint-metric-inflation
third-party-advisory
-
github.com
/lin-snow/Ech0
package
Sources
- CVE List CVE-2026-79668
- GitHub Advisory GHSA-rgj7-vg8v-j4wr
- NVD CVE-2026-79668
- OSV GO-2026-5623
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