CVE-2021-39194

    Dashboard / Vulnerabilities / CVE-2021-39194

    CVE-2021-39194

    Published: 7 Sept 2021Last Modified: 9 Jul 2026

    Summary:

    Details: kaml is an open source implementation of the YAML format with support for kotlinx.serialization. In affected versions attackers that could provide arbitrary YAML input to an application that uses kaml could cause the application to endlessly loop while parsing the input. This could result in resource starvation and denial of service. This only affects applications that use polymorphic serialization with the default tagged polymorphism style. Applications using the property polymorphism style are not affected. YAML input for a polymorphic type that provided a tag but no value for the object would trigger the issue. Version 0.35.3 or later contain the fix for this issue.

    References: https://github.com/charleskorn/kaml/commit/e18785d043fc6324c81e968aae9764b4b060bc6a, https://github.com/charleskorn/kaml/issues/179, https://github.com/charleskorn/kaml/security/advisories/GHSA-fmm9-3gv8-58f4

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -e18785d043fc6324c81e968aae9764b4b060bc6a

    Affected versions

    0.35.2
    0.35.1
    0.35.0

    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-2021-39194 | CVE-DB