CVE-2019-9813

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    CVE-2019-9813

    Published: 26 Apr 2019Last Modified: 16 Apr 2026

    Summary:

    Details: Incorrect handling of __proto__ mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and write. This vulnerability affects Firefox < 66.0.1, Firefox ESR < 60.6.1, and Thunderbird < 60.6.1.

    References: https://www.mozilla.org/security/advisories/mfsa2019-12/, https://access.redhat.com/errata/RHSA-2019:0966, https://access.redhat.com/errata/RHSA-2019:1144, https://www.mozilla.org/security/advisories/mfsa2019-09/, https://www.mozilla.org/security/advisories/mfsa2019-10/, https://bugzilla.mozilla.org/show_bug.cgi?id=1538006

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High