BIT-pillow-2026-96643

    Dashboard / Vulnerabilities / BIT-pillow-2026-96643

    BIT-pillow-2026-96643

    Published: 29 Oct 2026Last Modified: 29 Oct 2026

    Summary: Pillow: PNG eXIf chunk makes EXIF parsing run in quadratic time

    Details: Pillow is a Python imaging library. From 11.0.0 until 13.0.0, Exif.load() in src/PIL/Image.py repeatedly slices the remaining EXIF data while it begins with the six-byte Exif header. src/PIL/PngImagePlugin.py accepts an uncapped PNG eXIf chunk, so a file filled with repeated headers causes a new shrinking copy on every iteration and quadratic CPU work. The condition is reachable through Image.getexif(), Image._getexif(), and ImageOps.exif_transpose(), including common photo-upload rotation workflows. This issue is fixed in version 13.0.0.

    References: https://github.com/python-pillow/Pillow/commit/806e38381c781f32bbd22f4cd026678acd40fd6c, https://github.com/python-pillow/Pillow/pull/10073, https://github.com/python-pillow/Pillow/releases/tag/13.0.0, https://github.com/python-pillow/Pillow/security/advisories/GHSA-g4qv-2jxx-769h, https://nvd.nist.gov/vuln/detail/CVE-2026-96643

    Affected packages

    Package

    Name: pillow

    Purl: pkg:bitnami/pillow

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 11.0.0
    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