PYSEC-2026-1876

    Dashboard / Vulnerabilities / PYSEC-2026-1876

    PYSEC-2026-1876

    Published: 7 Jul 2026Last Modified: 7 Jul 2026

    Summary: FaucetSDN Ryu Denial of Service Vulnerability

    Details: An issue was discovered in `OFPBundleCtrlMsg` in `parser.py` in FaucetSDN Ryu version 4.34, allows remote attackers to cause a denial of service (DoS) (infinite loop).

    References: https://nvd.nist.gov/vuln/detail/CVE-2020-35139, https://github.com/faucetsdn/ryu/issues/118, https://github.com/faucetsdn/ryu, https://pypi.org/project/ryu, https://github.com/advisories/GHSA-4987-5p3p-9r27

    Affected packages

    Package

    Name: ryu

    Purl: pkg:pypi/ryu

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    0.2

    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-2026-1876 | CVE-DB