Debian dsa-6556 : nagios4 - security update

high Nessus Plugin ID 365110

Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6556 advisory.

- ------------------------------------------------------------------------- Debian Security Advisory DSA-6556-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff October 12, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : nagios4 CVE ID : CVE-2026-48549 CVE-2026-48550 CVE-2026-48551 CVE-2026-48552 CVE-2026-48553 CVE-2026-48554

Multiple security vulnerabilities were discovered in the Nagios monitoring system, which could result in cross-site request forgery, cross-site scripting or the execution of arbitrary commands.

For the stable distribution (trixie), these problems have been fixed in version 4.4.6-4.1+deb13u2.

We recommend that you upgrade your nagios4 packages.

For the detailed security status of nagios4 please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/nagios4

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: [email protected]

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.

Solution

Upgrade the nagios4 packages.

Plugin Details

Severity: High

ID: 365110

File Name: debian_DSA-6556.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Debian Local Security Checks

Published: 10/12/2026

Updated: 10/12/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.7

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

CVSS Score Source: CVE-2026-48552

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2026-48554

CVSS v4

Risk Factor: High

Base Score: 7.7

Threat Score: 5.2

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-48554

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:nagios4-cgi, p-cpe:/a:debian:debian_linux:nagios4-common, p-cpe:/a:debian:debian_linux:nagios4-core, p-cpe:/a:debian:debian_linux:nagios4

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 10/12/2026

Vulnerability Publication Date: 8/12/2026

Reference Information

CVE: CVE-2026-48549, CVE-2026-48550, CVE-2026-48551, CVE-2026-48552, CVE-2026-48553, CVE-2026-48554

Detections

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