CVE-2022-24859

    Dashboard / Vulnerabilities / CVE-2022-24859

    CVE-2022-24859

    Published: 18 Apr 2022Last Modified: 12 Aug 2026

    Summary: Manipulated inline images can cause Infinite Loop in PyPDF2

    Details: PyPDF2 is an open source python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. In versions prior to 1.27.5 an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop if the PyPDF2 if the code attempts to get the content stream. The reason is that the last while-loop in `ContentStream._readInlineImage` only terminates when it finds the `EI` token, but never actually checks if the stream has already ended. This issue has been resolved in version `1.27.5`. Users unable to upgrade should validate and PDFs prior to iterating over their content stream.

    References: https://github.com/py-pdf/PyPDF2/releases/tag/1.27.5, https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/24xxx/CVE-2022-24859.json, https://github.com/py-pdf/PyPDF2/security/advisories/GHSA-xcjx-m2pj-8g79, https://nvd.nist.gov/vuln/detail/CVE-2022-24859, https://github.com/py-pdf/PyPDF2/issues/329, https://github.com/py-pdf/PyPDF2/pull/740, https://lists.debian.org/debian-lts-announce/2022/06/msg00001.html, https://lists.debian.org/debian-lts-announce/2023/06/msg00013.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -733989af6fc0f87d69d78509f3766b47ffc24e1d

    Affected versions

    1.27.4
    1.27.3
    1.27.2
    1.27.1
    1.27.0

    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
    CVE-2022-24859 | CVE-DB