FasterXML jackson-databind Polymorphic Typing Information Disclosure Vulnerability [CVE-2019-12086]

CVE Number – CVE-2019-12086

A vulnerability in the jackson-databind component of FasterXML Jackson could allow an unauthenticated, remote attacker to access sensitive information on a targeted system. The vulnerability is due to a polymorphic typing issue in the affected software when Default Typing is enabled. An attacker could exploit this vulnerability by sending a crafted JSON message that submits malicious input to the affected software. A successful exploit could allow the attacker to access sensitive information on the targeted system.FasterXML has confirmed the vulnerability and released software updates.


  • To exploit this vulnerability, the attacker must send a crafted JSON message to the targeted system, which may require access to trusted, internal networks. This access limitation may reduce the likelihood of a successful exploit.


  • Administrators are advised to apply the appropriate updates.

    Administrators are advised to allow only trusted users to have network access.

    Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.

    Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

    Administrators can help protect affected systems from external attacks by using a solid firewall strategy.

    Administrators are advised to monitor affected systems.

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Duncan Newell

Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.

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