Botan is a C++ cryptography library. Prior to 3.12.0, certain patterns of indefinite length encodings in BER data could cause quadratic behavior in the parser, resulting in a denial of service. Such BER encodings were accepted even in structures which are required to be encoded as DER, which prohibits indefinite length encodings. This vulnerability is fixed in 3.12.0.

The remote Fedora 46 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-c5ca310459 advisory.

    Automatic update for botan3-3.12.0-1.fc46.

    ##### **Changelog**

    ```
    * Wed Aug 12 2026 Carlos Rodriguez-Fernandez <carlosrodrifernandez@gmail.com> - 3.12.0-1
    - Update to 3.12.0 (rhbz#2483287)

    ```

Tenable has extracted the preceding description block directly from the Fedora 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 remote Debian 13 host has packages installed that are affected by a vulnerability as referenced in the dsa-6412 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6412-1                   security@debian.org     https://www.debian.org/security/                                  Aron Xu     August 05, 2026                       https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : botan3     CVE ID         : CVE-2026-44378     Debian Bug     :

    Multiple security issues were discovered in Botan, a C++ cryptography     library, which could result in denial of service, certificate validation     bypass or authentication bypass.

    These issues have been addressed by updating botan3 to the new upstream     release 3.12.0. As a consequence this update changes the SONAME of the     shared library, and the runtime library package is renamed from     libbotan-3-7 to libbotan-3-12. No package in the stable distribution links     against the library, so no other packages in trixie are affected by this     change.

    The libbotan-3-7 package is no longer built and will not be removed     automatically on upgrade if it had been installed manually. Locally built     or third-party software linking against libbotan-3-7 needs to be rebuilt     against libbotan-3-12, after which the old library package can be removed.

    For the stable distribution (trixie), this problem has been fixed in     version 3.12.0+dfsg-2~deb13u1.

    We recommend that you upgrade your botan3 packages.

    For the detailed security status of botan3 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/botan3

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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.

  - Botan is a C++ cryptography library. Prior to 3.12.0, certain patterns of indefinite length encodings in     BER data could cause quadratic behavior in the parser, resulting in a denial of service. Such BER     encodings were accepted even in structures which are required to be encoded as DER, which prohibits     indefinite length encodings. This vulnerability is fixed in 3.12.0. (CVE-2026-44378)

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

ID	Name	Product	Family	Type	Severity
334648	Fedora 46 : botan3 (2026-c5ca310459)	Nessus	Fedora Local Security Checks	Local	medium
332087	Debian dsa-6412 : botan - security update	Nessus	Debian Local Security Checks	Local	medium
315713	Linux Distros Unpatched Vulnerability : CVE-2026-44378	Nessus	Misc.	Local	medium

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