PYSEC-2020-49

    Dashboard / Vulnerabilities / PYSEC-2020-49

    PYSEC-2020-49

    Published: 17 Dec 2020Last Modified: 10 Jun 2026

    Summary:

    Details: ** DISPUTED ** jsonpickle through 1.4.1 allows remote code execution during deserialization of a malicious payload through the decode() function. Note: It has been argued that this is expected and clearly documented behaviour. pickle is known to be capable of causing arbitrary code execution, and must not be used with un-trusted data.

    References: https://gist.github.com/j0lt-github/bb543e77a1a10c33cb56cf23d0837874, https://github.com/jsonpickle/jsonpickle/issues/332, https://github.com/j0lt-github/python-deserialization-attack-payload-generator, https://versprite.com/blog/application-security/into-the-jar-jsonpickle-exploitation/, https://access.redhat.com/security/cve/CVE-2020-22083, https://github.com/jsonpickle/jsonpickle/issues/332#issuecomment-747807494, https://github.com/advisories/GHSA-j66q-qmrc-89rx

    Affected packages

    Package

    Name: jsonpickle

    Purl: pkg:pypi/jsonpickle

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.4.2

    Affected versions

    0.0.1
    0.0.2
    0.0.4
    0.0.5

    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
    PYSEC-2020-49 | CVE-DB