The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6496 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6496-1                   security@debian.org     https://www.debian.org/security/                                  Aron Xu     September 12, 2026                    https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : nginx     CVE ID         : CVE-2026-42533 CVE-2026-56434 CVE-2026-60005

    Multiple vulnerabilities were discovered in nginx, a high-performance web     and reverse proxy server, which may result in denial of service, memory     disclosure or potentially the execution of arbitrary code.

    CVE-2026-42533

        A heap buffer overflow was discovered in the nginx script engine. It         can be triggered when a map directive performs regular expression         matching and a string expression references captures modified by the         map, or when non-cacheable variables change between the script length         pass and the script copy pass.

    CVE-2026-56434

        Duplicate finalization of an HTTP subrequest can result in a         use-after-free. The issue is observable in configurations using         server-side includes together with proxy_pass and proxy_buffering         disabled, when an upstream response causes the same subrequest to be         posted twice.

    CVE-2026-60005

        ngx_http_regex_exec() could replace the captures array without         clearing r->ncaptures when the new regular expression did not match.
        A subsequent unnamed capture could then access uninitialised memory,         resulting in memory disclosure.

    For the stable distribution (trixie), these problems have been fixed in     version 1.26.3-3+deb13u8.

    We recommend that you upgrade your nginx packages.

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

    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 these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

Debian dsa-6496 : libnginx-mod-http-geoip - security update

critical Nessus Plugin ID 345000

Version 1.2

Version 1.1

Version 1.2 Sep 23, 2026, 8:20 AM CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:F/RL:OF/RC:C") CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:F/RL:O/RC:C") Exploit attributes ("Exploit framework core" set to "True") Plugin Feed: 202609230820
Version 1.1 Sep 12, 2026, 3:45 PM New Plugin Feed: 202609121545