{"id":"CVE-2026-35036","revision":"fa9d4954e1fb494184f7ed8c10406bf4","records":[{"revision":"fa9d4954e1fb494184f7ed8c10406bf4","observedAt":"2026-10-25T08:17:35.884+00:00","statement":{"source":"nvd","id":"CVE-2026-35036","aliases":[],"title":"Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to 4.2.8, Ech0 implements link preview (editor fetches a page title) through GET /api/website/title. That is legitimate product behavior, but the imple…","description":"Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to 4.2.8, Ech0 implements link preview (editor fetches a page title) through GET /api/website/title. That is legitimate product behavior, but the implementation is unsafe: the route is unauthenticated, accepts a fully attacker-controlled URL, performs a server-side GET, reads the entire response body into memory (io.ReadAll). There is no host allowlist, no SSRF filter, and InsecureSkipVerify: true on the outbound client. Anyone who can reach the instance can force the Ech0 server to open HTTP/HTTPS URLs of their choice as seen from the server’s network position (Docker bridge, VPC, localhost from the process view). This vulnerability is fixed in 4.2.8.","state":0,"publishedAt":"2026-04-06T17:17:12.94+00:00","modifiedAt":"2026-10-24T13:10:00.147+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/lin-snow/Ech0/security/advisories/GHSA-wc4h-2348-jc3p"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-35036","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-918"],"productCriteria":["cpe:2.3:a:ech0:ech0:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-04-06T17:17:12.940","lastModified":"2026-10-24T13:10:00.147"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-35036","identifiers":["CVE-2026-35036"]},"retained":false,"historicalAffected":[]}],"coverage":[]}