pypdf is a free and open-source pure-python PDF library. Prior to version 6.0.0, an attacker can craft a PDF which leads to the RAM being exhausted. This requires just reading the file if a series of FlateDecode filters is used on a malicious cross-reference stream. Other content streams are affected on explicit access. This issue has been fixed in 6.0.0. If an update is not possible, a workaround involves including the fixed code from pypdf.filters.decompress into the existing filters file.

The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20333-1 advisory.

    Changes in python-PyPDF2:

    - CVE-2026-27628: Fixed infinite loop when loading circular /Prev entries in cross-reference streams     (bsc#1258940)
    - CVE-2026-27888: Fixed issue where manipulated FlateDecode XFA streams can exhaust RAM (bsc#1258934)
    - CVE-2025-55197: Fixed denial of service via craft PDF (bsc#1248089)
    - CVE-2026-27024: Fixed infinite loop when processing TreeObject (bsc#1258691)
    - CVE-2026-27025: Fixed long runtimes/large memory usage for large /ToUnicode streams (bsc#1258692)
    - CVE-2026-27026: Fixed long runtimes for malformed FlateDecode streams (bsc#1258693)

    - Convert to pip-based build

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 version 6.0.0, an attacker can craft a     PDF which leads to the RAM being exhausted. This requires just reading the file if a series of FlateDecode     filters is used on a malicious cross-reference stream. Other content streams are affected on explicit     access. This issue has been fixed in 6.0.0. If an update is not possible, a workaround involves including     the fixed code from pypdf.filters.decompress into the existing filters file. (CVE-2025-55197)

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 6.0.0, an attacker can craft a
    PDF which leads to the RAM being exhausted. This requires just reading the file if a series of FlateDecode
    filters is used on a malicious cross-reference stream. Other content streams are affected on explicit
    access. This issue has been fixed in 6.0.0. If an update is not possible, a workaround involves including
    the fixed code from pypdf.filters.decompress into the existing filters file. (CVE-2025-55197)

ID	Name	Product	Family	Severity
301471	openSUSE 16 Security Update : python-PyPDF2 (openSUSE-SU-2026:20333-1)	Nessus	SuSE Local Security Checks	high
260000	Linux Distros Unpatched Vulnerability : CVE-2025-55197	Nessus	Misc.	high
433344	SCA: security update for pypdf (GHSA-7hfw-26vp-jp8m)	Tenable Cloud Security	SCA Checks	high
433344	SCA: security update for pypdf (GHSA-7hfw-26vp-jp8m)	Tenable Self-Hosted Container Security	SCA Checks	high

Detections

Analytics

CVE-2025-55197

high

Tenable Plugins

high

high

high

high