PYSEC-2026-576

    Dashboard / Vulnerabilities / PYSEC-2026-576

    PYSEC-2026-576

    Published: 29 Jun 2026Last Modified: 1 Jul 2026

    Summary: Heap-based buffer overflow in ZBar

    Details: A heap-based buffer overflow exists in the qr_reader_match_centers function of ZBar 0.23.90. Specially crafted QR codes may lead to information disclosure and/or arbitrary code execution. To trigger this vulnerability, an attacker can digitally input the malicious QR code, or prepare it to be physically scanned by the vulnerable scanner.

    References: https://nvd.nist.gov/vuln/detail/CVE-2023-40889, https://github.com/mchehab/zbar, https://hackmd.io/@cspl/B1ZkFZv23, https://lists.debian.org/debian-lts-announce/2023/12/msg00001.html, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/25LZZQJGGZRPLKTRNRNOTAFQJIPS7WRP, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DC7V5YCLCPB36J2KY6WLZCABFLBRB665, https://pypi.org/project/zbar, https://github.com/advisories/GHSA-mhp6-jvpx-2p4m

    Affected packages

    Package

    Name: zbar

    Purl: pkg:pypi/zbar

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    0.10

    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-2026-576 | CVE-DB