GHSA-f4w8-cv6p-x6r5

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    GHSA-f4w8-cv6p-x6r5

    Published: 18 Mar 2021Last Modified: 15 Aug 2025

    Summary: Pillow Denial of Service by Uncontrolled Resource Consumption

    Details: Pillow before 8.1.2 allows attackers to cause a denial of service (memory consumption) because the reported size of a contained image is not properly checked for a BLP container, and thus an attempted memory allocation can be very large.

    References: https://nvd.nist.gov/vuln/detail/CVE-2021-27921, https://github.com/python-pillow/Pillow/commit/756fff33128a0b643d10518a26ad04b726dd8973, https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2021-40.yaml, https://github.com/python-pillow/Pillow, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S7G44Z33J4BNI2DPDROHWGVG2U7ZH5JU, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQQY6472RX4J2SUJENWDZAWKTJJGP2ML, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZTSY25UJU7NJUFHH3HWT575LT4TDFWBZ, https://lists.fedoraproject.org/archives/list/[email protected]/message/S7G44Z33J4BNI2DPDROHWGVG2U7ZH5JU, https://lists.fedoraproject.org/archives/list/[email protected]/message/TQQY6472RX4J2SUJENWDZAWKTJJGP2ML, https://lists.fedoraproject.org/archives/list/[email protected]/message/ZTSY25UJU7NJUFHH3HWT575LT4TDFWBZ, https://pillow.readthedocs.io/en/stable/releasenotes/8.1.1.html, https://pillow.readthedocs.io/en/stable/releasenotes/8.1.2.html, https://security.gentoo.org/glsa/202107-33

    Affected packages

    Package

    Name: pillow

    Purl: pkg:pypi/pillow

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -8.1.2

    Affected versions

    1.0

    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
    GHSA-f4w8-cv6p-x6r5 | CVE-DB