PYSEC-2026-1833

    Dashboard / Vulnerabilities / PYSEC-2026-1833

    PYSEC-2026-1833

    Published: 7 Jul 2026Last Modified: 7 Jul 2026

    Summary: pypdf possibly loops infinitely when reading DCT inline images without EOF marker

    Details: ### Impact An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires parsing the content stream of a page which has an inline image using the DCTDecode filter. ### Patches This has been fixed in [pypdf==6.1.3](https://github.com/py-pdf/pypdf/releases/tag/6.1.3). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3501](https://github.com/py-pdf/pypdf/pull/3501).

    References: https://github.com/py-pdf/pypdf/security/advisories/GHSA-vr63-x8vc-m265, https://nvd.nist.gov/vuln/detail/CVE-2025-62707, https://github.com/py-pdf/pypdf/pull/3501, https://github.com/py-pdf/pypdf/commit/f2864d6dd9bac7cecd3f4f54308b25ebbfa178f8, https://github.com/py-pdf/pypdf, https://github.com/py-pdf/pypdf/releases/tag/6.1.3, https://pypi.org/project/pypdf, https://github.com/advisories/GHSA-vr63-x8vc-m265

    Affected packages

    Package

    Name: pypdf

    Purl: pkg:pypi/pypdf

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -6.1.3

    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
    PYSEC-2026-1833 | CVE-DB