Vulnerability · Published Aug 25, 2026 · Assigned by VulnCheck
CVE-2026-79660Ech0 before 4.7.3 Email Disclosure via Public API
Medium 5.3
In plain English
A medium-severity information exposure in Ech0 from lin-snow. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 64.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Ech0 versions before 4.7.3 expose guest commenter email addresses through public API endpoints due to improper JSON serialization tags on the Comment model. Unauthenticated attackers can harvest all commenter emails by calling the /api/comments and /api/comments/public endpoints without authentication.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/lin-snow/Ech0 | 1.4.8-0.20260503034700-cb8d7a997dd8 | GHSA-rj4g-rqgh-rx9h |
| Go | github.com/lin-snow/ech0 | 1.4.8-0.20260503034700-cb8d7a997dd8 | GO-2026-5626 |
Affected products (as reported)
Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- GitHub Security Advisory (GHSA-rj4g-rqgh-rx9h) vendor-advisory
- VulnCheck Advisory: Ech0 before 4.7.3 Email Disclosure via Public API third-party-advisory