pypdf is a free and open-source pure-python PDF library. Prior to 6.8.0, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing a content stream with a rather large /Length value, regardless of the actual data length inside the stream. This vulnerability is fixed in 6.8.0.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:20375-1 advisory.

    Changes in python-PyPDF2:

    - CVE-2025-31826: Fixed denial of service due to excessive memory consumption via crafted PDF     (bsc#1259508).

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 6.8.0, an attacker who uses this     vulnerability can craft a PDF which leads to large memory usage. This requires parsing a content stream     with a rather large /Length value, regardless of the actual data length inside the stream. This     vulnerability is fixed in 6.8.0. (CVE-2026-31826)

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 6.8.0, an attacker who uses this
    vulnerability can craft a PDF which leads to large memory usage. This requires parsing a content stream
    with a rather large /Length value, regardless of the actual data length inside the stream. This
    vulnerability is fixed in 6.8.0. (CVE-2026-31826)

ID	Name	Product	Family	Type	Severity
303020	openSUSE 16 Security Update : python-PyPDF2 (openSUSE-SU-2026:20375-1)	Nessus	SuSE Local Security Checks	Local	medium
302070	Linux Distros Unpatched Vulnerability : CVE-2026-31826	Nessus	Misc.	Local	medium
438610	SCA: security update for pypdf (GHSA-hqmh-ppp3-xvm7)	Tenable Cloud Security	SCA Checks	Local	medium
438610	SCA: security update for pypdf (GHSA-hqmh-ppp3-xvm7)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-31826

medium

Tenable Plugins

medium

medium

medium

medium