{"answers":{"affected":"3 open source packages ship an affected version, including github.com/lin-snow/ech0. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35036 exists.","fix":"Upgrade github.com/lin-snow/ech0 to 1.4.8-0.20260401031029-4ca56fea5ba4 or later.","what":"CVE-2026-35036 is a high-severity server-side request forgery vulnerability in lin-snow Ech0, published on 6 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-35036 and fix it if it is affected.\n\nWhat it is: CVE-2026-35036 is a high-severity server-side request forgery vulnerability in lin-snow Ech0, published on 6 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-35036 exists.\n\nAffected packages and fixed versions:\n- github.com/lin-snow/ech0 (Go): affected all versions; fixed in 1.4.8-0.20260401031029-4ca56fea5ba4\n- github.com/lin-snow/ech0 (Go): affected all versions; fixed in 1.4.8-0.20260401031029-4ca56fea5ba4\n- github.com/lin-snow/ech0 (Go): affected all versions; fixed in 1.4.8-0.20260401031029-4ca56fea5ba4\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-35036/ (Markdown: https://insights.sbomify.com/CVE-2026-35036/index.md)","id":"CVE-2026-35036","markdown":"https://insights.sbomify.com/CVE-2026-35036/index.md","name":"CVE-2026-35036","record":{"aliases":["GHSA-wc4h-2348-jc3p","GO-2026-5704"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Ech0 publishing platform","requires_auth":"none","summary":"Unauthenticated attackers can force the Ech0 server to make arbitrary HTTP requests, potentially accessing internal network resources or sensitive data.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"ech0","vendor":"ech0"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"}],"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.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Ech0 Affected by Unauthenticated Server-Side Request Forgery in Website Preview Feature","id":"CVE-2026-35036","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"Ech0 affected by unauthenticated SSRF in GetWebsiteTitle allows access to internal services and cloud metadata","id":"CVE-2026-35037"},"packages":[{"ecosystem":"Go","fixed":["1.4.8-0.20260401031029-4ca56fea5ba4"],"introduced":["0"],"last_affected":[],"package":"github.com/lin-snow/ech0","purl":null,"source":"GHSA-wc4h-2348-jc3p"},{"ecosystem":"Go","fixed":["1.4.8-0.20260401031029-4ca56fea5ba4"],"introduced":["0"],"last_affected":[],"package":"github.com/lin-snow/ech0","purl":"pkg:golang/github.com/lin-snow/ech0","source":"GHSA-wc4h-2348-jc3p"},{"ecosystem":"Go","fixed":["1.4.8-0.20260401031029-4ca56fea5ba4"],"introduced":["0"],"last_affected":[],"package":"github.com/lin-snow/ech0","purl":"pkg:golang/github.com/lin-snow/ech0","source":"GO-2026-5704"}],"prev":{"headline":"CI4MS: Company Information Public-Facing Page Full Platform Compromise \u0026 Full Account Takeover for All Roles \u0026 Privilege-Escalation via System Settings Company Information Stored DOM XSS","id":"CVE-2026-35035"},"products":["Ech0"],"published":"2026-04-06","related":[{"cvss_score":7.2,"headline":"Ech0 affected by unauthenticated SSRF in GetWebsiteTitle allows access to internal services and cloud metadata","id":"CVE-2026-35037","kev_date_added":null,"published":"2026-04-06"},{"cvss_score":5.3,"headline":"Ech0 authenticated user-list exposed data via public `/api/allusers` endpoint","id":"CVE-2026-33638","kev_date_added":null,"published":"2026-03-26"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-07","vendors":["lin-snow"]},"summary":"Unauthenticated attackers can force the Ech0 server to make arbitrary HTTP requests, potentially accessing internal network resources or sensitive data.","url":"https://insights.sbomify.com/CVE-2026-35036/"}