CVE-2026-9507

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "osTicket", "vendor": "Enhancesoft", "versions": [{"status": "affected", "version": "1.18.2"}]}], "source": "cve-coordination@incibe.es"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A session fixation vulnerability has been identified in osTicket v1.18.2. This security flaw allows an attacker to hijack a victim\u2019s account by keeping the initial session identifier (OSTSESSID) active after a successful login.\n\n\n\nThe issue lies in the fact that the application does not invalidate the pre-authentication cookie or generate a new identifier for the authenticated context. As a result, if an attacker manages to set a known session identifier in the victim\u2019s browser, they will be able to maintain unauthorised access to the account once the victim has authenticated."}, {"lang": "es", "value": "Una vulnerabilidad de fijaci\u00f3n de sesi\u00f3n ha sido identificada en osTicket v1.18.2. Este fallo de seguridad permite a un atacante secuestrar la cuenta de una v\u00edctima manteniendo activo el identificador de sesi\u00f3n inicial (OSTSESSID) despu\u00e9s de un inicio de sesi\u00f3n exitoso.\n\nEl problema radica en el hecho de que la aplicaci\u00f3n no invalida la cookie de pre-autenticaci\u00f3n ni genera un nuevo identificador para el contexto autenticado. Como resultado, si un atacante logra establecer un identificador de sesi\u00f3n conocido en el navegador de la v\u00edctima, podr\u00e1 mantener acceso no autorizado a la cuenta una vez que la v\u00edctima se haya autenticado."}], "id": "CVE-2026-9507", "lastModified": "2026-10-26T12:10:00.130", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.1, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cve-coordination@incibe.es", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-9507", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-16T16:18:00.355878Z", "version": "2.0.3"}}]}, "published": "2026-06-16T13:16:38.140", "references": [{"source": "cve-coordination@incibe.es", "url": "https://www.incibe.es/en/incibe-cert/notices/aviso/session-fixation-vulnerability-enhancesofts-osticket"}], "sourceIdentifier": "cve-coordination@incibe.es", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-38"}], "source": "cve-coordination@incibe.es", "type": "Secondary"}]}

{}

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