BIT-pillow-2026-96638

    Dashboard / Vulnerabilities / BIT-pillow-2026-96638

    BIT-pillow-2026-96638

    Published: 29 Oct 2026Last Modified: 29 Oct 2026

    Summary: Pillow: BMP RLE decoder memory-amplification DoS via unbounded delta escape / absolute mode

    Details: Pillow is a Python imaging library. From 9.1.0 until 13.0.0, BmpRleDecoder.decode() in src/PIL/BmpImagePlugin.py permits crafted RLE BMP delta escapes and absolute-mode runs to append beyond the remaining dest_length without a per-branch cap. A delta can add roughly 255 image rows in one iteration, so a kilobyte-sized file with a large but permitted width can expand the data bytearray to hundreds of megabytes or more, causing memory-exhaustion denial of service. This issue is fixed in version 13.0.0.

    References: https://github.com/python-pillow/Pillow/commit/e7794835e323ff2691d9b3a974cade1a44301b9a, https://github.com/python-pillow/Pillow/pull/10015, https://github.com/python-pillow/Pillow/releases/tag/13.0.0, https://github.com/python-pillow/Pillow/security/advisories/GHSA-24rc-8hj2-v98c, https://nvd.nist.gov/vuln/detail/CVE-2026-96638

    Affected packages

    Package

    Name: pillow

    Purl: pkg:bitnami/pillow

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 9.1.0
    Fixed -13.0.0

    Affected versions

    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