{"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-2026-35037 exists.","fix":"Upgrade github.com/lin-snow/ech0 to 1.4.8-0.20260401031029-4ca56fea5ba4 or later.","what":"CVE-2026-35037 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-2026-35037 and fix it if it is affected.\n\nWhat it is: CVE-2026-35037 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-2026-35037 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-2026-35037/ (Markdown: https://insights.sbomify.com/CVE-2026-35037/index.md)","id":"CVE-2026-35037","markdown":"https://insights.sbomify.com/CVE-2026-35037/index.md","name":"CVE-2026-35037","record":{"aliases":["GHSA-cqgf-f4x7-g6wc","GO-2026-5331"],"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 exploit Ech0 to access internal services and cloud metadata via server-side request forgery.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"ech0","vendor":"ech0"}],"cvss":{"score":7.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/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, 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 \u003ctitle\u003e tag extraction This vulnerability is fixed in 4.2.8.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":"2026-05-20","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":1,"refs":[{"date":"2026-05-20T04:24:58Z","kind":"github_poc","ref":"https://github.com/fineman999/POC_CVE-2026-35037","stars":0,"title":"POC_CVE-2026-35037"},{"date":null,"kind":"nuclei","ref":"http/cves/2026/CVE-2026-35037.yaml","stars":null,"title":"Ech0 \u003c 4.2.8 - Server-Side Request Forgery"}],"tier":"weaponised"},"has_fix":true,"headline":"Ech0 affected by unauthenticated SSRF in GetWebsiteTitle allows access to internal services and cloud metadata","id":"CVE-2026-35037","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"signalk-server: Arbitrary Prototype Read via `from` Field Bypass","id":"CVE-2026-35038"},"packages":[{"ecosystem":"Go","fixed":["1.4.8-0.20260401031029-4ca56fea5ba4"],"introduced":["0"],"last_affected":[],"package":"github.com/lin-snow/ech0","purl":null,"source":"GHSA-cqgf-f4x7-g6wc"},{"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-cqgf-f4x7-g6wc"},{"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-2026-5331"}],"prev":{"headline":"Ech0 Affected by Unauthenticated Server-Side Request Forgery in Website Preview Feature","id":"CVE-2026-35036"},"products":["Ech0"],"published":"2026-04-06","related":[{"cvss_score":7.5,"headline":"Ech0 Affected by Unauthenticated Server-Side Request Forgery in Website Preview Feature","id":"CVE-2026-35036","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)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-06","vendors":["lin-snow"]},"summary":"Unauthenticated attackers can exploit Ech0 to access internal services and cloud metadata via server-side request forgery.","url":"https://insights.sbomify.com/CVE-2026-35037/"}