CVE-2022-21653

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    CVE-2022-21653

    Published: 5 Jan 2022Last Modified: 12 Aug 2026

    Summary: Hash collision in typelevel jawn

    Details: Jawn is an open source JSON parser. Extenders of the `org.typelevel.jawn.SimpleFacade` and `org.typelevel.jawn.MutableFacade` who don't override `objectContext()` are vulnerable to a hash collision attack which may result in a denial of service. Most applications do not implement these traits directly, but inherit from a library. `jawn-parser-1.3.1` fixes this issue and users are advised to upgrade. For users unable to upgrade override `objectContext()` to use a collision-safe collection.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21653.json, https://github.com/typelevel/jawn/security/advisories/GHSA-vc89-hccf-rq55, https://nvd.nist.gov/vuln/detail/CVE-2022-21653, https://github.com/typelevel/jawn/pull/390

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -daaf6f8e1067363f4748159612c6ec2162522303

    Affected versions

    v1.3.0

    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
    CVE-2022-21653 | CVE-DB