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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
lin-snow Ech0 unaffected
Version Status Constraints
0 affected < 4.7.3
4.7.3 unaffected —

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No data.

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Project Subscriptions

Vendors Products
Ech0 Subscribe
Ech0 Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/lin-snow/Ech0/security/advisories/GHSA-rj4g-rqgh-rx9h cve-icon cve-icon
https://www.vulncheck.com/advisories/ech0-before-email-disclosure-via-public-api cve-icon cve-icon
History

Tue, 25 Aug 2026 11:45:00 +0000

Type Values Removed Values Added
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.
Title Ech0 before 4.7.3 Email Disclosure via Public API
First Time appeared Ech0
Ech0 ech0
Weaknesses CWE-200
CPEs cpe:2.3:a:ech0:ech0:*:*:*:*:*:*:*:*
Vendors & Products Ech0
Ech0 ech0
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-25T11:33:24.692Z

Reserved: 2026-08-25T11:09:11.171Z

Link: CVE-2026-79660

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-25T12:16:29.617

Modified: 2026-08-25T12:16:29.617

Link: CVE-2026-79660

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-25T12:30:17Z

Weaknesses