What is CVE-2026-35037?

CVE-2026-35037 is a high-severity vulnerability in Lin-snow Ech0, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.2/10. Published 2026-04-06.

How severe is CVE-2026-35037?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2026-35037 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SSRF in Lin-snow Ech0

CVE-2026-35037

Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to 4.2.8, the GET /api/website/title endpoint accepts an arbitrary URL via the website_url query parameter and makes a server-side HTTP request to it…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.000 (6.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Lin-snow Ech0 — versions < 4.2.8

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Public proof-of-concept exploits

fineman999/POC_CVE-2026-35037

References

https://github.com/lin-snow/Ech0/security/advisories/GHSA-cqgf-f4x7-g6wc (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-35037?: CVE-2026-35037 is a high-severity vulnerability in Lin-snow Ech0, classified under Server-Side Request Forgery (SSRF). CVSS score: 7.2/10. Published 2026-04-06.
How severe is CVE-2026-35037?: High severity. CVSS v3 base score is 7.2 out of 10.
Is CVE-2026-35037 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.