CVE-2026-119209

    Dashboard / Vulnerabilities / CVE-2026-119209

    CVE-2026-119209

    Published: 29 Oct 2026Last Modified: 4 Nov 2026

    Summary: pypdf: Possible large memory usage when parsing cross-reference streams

    Details: pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive memory while opening a crafted PDF containing cross-reference streams that declare very large entry counts. Highly compressible streams and /Prev chains can multiply the number of parsed entries across a document, while negative /Index counts can bypass the existing per-stream clamp. This issue is fixed in version 6.21.3.

    References: https://github.com/py-pdf/pypdf/releases/tag/6.21.3, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119209.json, https://github.com/py-pdf/pypdf/security/advisories/GHSA-x3rh-gjgm-fmqc, https://nvd.nist.gov/vuln/detail/CVE-2026-119209, https://github.com/py-pdf/pypdf/commit/a93fe3a901fd00af38f0a105c3ba7175fa72dcb4, https://github.com/py-pdf/pypdf/pull/4269

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -a9f9c4f16f1fb6b48be089ef6eae250dbaef5d23

    Affected versions

    6.21.2
    6.21.1
    6.21.0

    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-2026-119209 | CVE-DB