High severity7.2GHSA Advisory· Published Apr 6, 2026· Updated Apr 22, 2026
CVE-2026-35037
CVE-2026-35037
Description
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 without any validation of the target host or IP address. The endpoint requires no authentication. An attacker can use this to reach internal network services, cloud metadata endpoints (169.254.169.254), and localhost-bound services, with partial response data exfiltrated via the HTML <title> tag extraction This vulnerability is fixed in 4.2.8.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/lin-snow/ech0Go | < 1.4.8-0.20260401031029-4ca56fea5ba4 | 1.4.8-0.20260401031029-4ca56fea5ba4 |
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
3- github.com/lin-snow/Ech0/security/advisories/GHSA-cqgf-f4x7-g6wcnvdExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-cqgf-f4x7-g6wcghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-35037ghsaADVISORY
News mentions
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