pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:20348-1 advisory.

    Changes in python-PyPDF2:

    - CVE-2026-28804: Denial of Service via crafted PDF with ASCIIHexDecode filter (bsc#1259404)
    - Update sources with osc run download_files

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

Note that Nessus has not tested for this issue 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 version 6.7.5, an attacker who uses this     vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses     the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5. (CVE-2026-28804)

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 version 6.7.5, an attacker who uses this
    vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses
    the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5. (CVE-2026-28804)

ID	Name	Product	Family	Type	Severity
302090	openSUSE 16 Security Update : python-PyPDF2 (openSUSE-SU-2026:20348-1)	Nessus	SuSE Local Security Checks	Local	medium
301404	Linux Distros Unpatched Vulnerability : CVE-2026-28804	Nessus	Misc.	Local	medium
438229	SCA: security update for pypdf (GHSA-9m86-7pmv-2852)	Tenable Cloud Security	SCA Checks	Local	medium
438229	SCA: security update for pypdf (GHSA-9m86-7pmv-2852)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-28804

medium

Tenable Plugins

medium

medium

medium

medium