pypdf is a free and open-source pure-python PDF library. Prior to 6.21.1, an attacker can craft a PDF containing image data labeled with the /DCTDecode filter that causes Pillow to select and invoke an unintended image parser when the image is loaded. Environments without the optional Pillow dependency are not affected. This issue is fixed in version 6.21.1.

The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:22188-1 advisory.

    Changes in python-pypdf:

    - CVE-2026-113786: PDF containing image data labeled with the       `/DCTDecode` filter causes Pillow to select and invoke an       unintended image parser when the image is loaded (bsc#1286632)
    - CVE-2026-113789: crafted PDF causes large memory usage or long       runtimes when an application retrieves the document's form fields       (bsc#1286633)
    - CVE-2026-113790: PDF containing arrays or dictionaries with many       elements causes parsing to consume large amounts of memory       (bsc#1286634)
    - CVE-2026-113791: PDF containing a content stream with many small       operations causes parsing to consume large amounts of memory       (bsc#1286635)
    - CVE-2026-113792: calling `PdfWriter.find_outline_item` on a       crafted PDF with a cyclic outline hierarchy can enter an infinite       loop and block the current process (bsc#1286636)
    - CVE-2026-113793: removing an object from a crafted cyclic PDF       tree can enter an infinite loop and block the current process       (bsc#1286637)
    - CVE-2026-113794: incomplete PDF that ends inside a standard       cross-reference table causes pypdf to mishandle the unexpected       end of file and enter an infinite loop (bsc#1286638)
    - CVE-2026-113795: accessing a crafted PDF stream with a large       number of filters or multiple filters that pass around large       amounts of data can cause large memory consumption (bsc#1286639)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - pypdf is a free and open-source pure-python PDF library. Prior to 6.21.1, an attacker can craft a PDF     containing image data labeled with the /DCTDecode filter that causes Pillow to select and invoke an     unintended image parser when the image is loaded. Environments without the optional Pillow dependency are     not affected. This issue is fixed in version 6.21.1. (CVE-2026-113786)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - pypdf is a free and open-source pure-python PDF library. Prior to 6.21.1, an attacker can craft a PDF
    containing image data labeled with the /DCTDecode filter that causes Pillow to select and invoke an
    unintended image parser when the image is loaded. Environments without the optional Pillow dependency are
    not affected. This issue is fixed in version 6.21.1. (CVE-2026-113786)

ID	Name	Product	Family	Type	Severity
374765	openSUSE 16 Security Update : python-pypdf (openSUSE-SU-2026:22188-1)	Nessus	SuSE Local Security Checks	Local	medium
370944	Linux Distros Unpatched Vulnerability : CVE-2026-113786	Nessus	Misc.	Local	low
476785	Chainguard: multiple open-webui packages: security update to 0.12.3-r5	Tenable Cloud Security	Chainguard Local Security Checks	Local	low
476785	Chainguard: multiple open-webui packages: security update to 0.12.3-r5	Tenable Self-Hosted Container Security	Chainguard Local Security Checks	Local	low
476583	SCA: security update for pypdf (GHSA-5hx5-vpf9-5wcv)	Tenable Cloud Security	SCA Checks	Local	low
476583	SCA: security update for pypdf (GHSA-5hx5-vpf9-5wcv)	Tenable Self-Hosted Container Security	SCA Checks	Local	low

Detections

Analytics

CVE-2026-113786

low

Tenable Plugins

medium

low

low

low

low

low