The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4765 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4765-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                       Andrej Shadura     August 31, 2026                               https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : expat     Version        : 2.5.0-1+deb12u3     CVE ID         : CVE-2026-50219 CVE-2026-56131 CVE-2026-56403                      CVE-2026-56404 CVE-2026-56405 CVE-2026-56406                      CVE-2026-56407 CVE-2026-56408 CVE-2026-56409                      CVE-2026-56410 CVE-2026-56411 CVE-2026-56412                      CVE-2026-72522 CVE-2026-76957

    CVE-2026-50219, CVE-2026-56131, CVE-2026-76957

        Calling certain libexpat functions from within a handler could cause         use-after-free.

    CVE-2026-56403, CVE-2026-56404, CVE-2026-56405, CVE-2026-56406,     CVE-2026-56407, CVE-2026-56408, CVE-2026-56409, CVE-2026-56410,     CVE-2026-56411

        Integer overflow in several functions.

    CVE-2026-56412

        A missing reentrancy guard around CDATA section handler calls could         cause use-after-free.

    CVE-2026-72522

        An out-of-bounds read in expat's internal UTF-16 conversion functions         could cause an infinite loop when processing crafted input, resulting         in a denial of service.

    For Debian 12 bookworm, these problems have been fixed in version     2.5.0-1+deb12u3.

    We recommend that you upgrade your expat packages.

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

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

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

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

Detections

Analytics

Debian dla-4765 : expat - security update

high Nessus Plugin ID 341830

Version 1.3

Version 1.2

Version 1.1

Version 1.3 Sep 10, 2026, 3:20 PM CVSS metrics ("CVSSv2 score" set to 6.8) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C") CVSS metrics ("CVSSv3 score" set to 7.8) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H") CVSSv2 score source (changed from "CVE-2026-56412" to "CVE-2026-76957") CVSSv3 score source (changed from "CVE-2026-56405" to none) CVSSv3 severity (based on None, severity increased from "Medium" to "High") Plugin Feed: 202609101520
Version 1.2 Sep 4, 2026, 12:58 PM Plugin metadata (Add IAVM info) Plugin Feed: 202609041258
Version 1.1 Sep 1, 2026, 5:14 AM New Plugin Feed: 202609010514