FreeBSD : (lib)expat -- Insufficient entropy (88440f1d-4168-11f1-95f7-00a098b42aeb)

high Nessus Plugin ID 310391

Synopsis

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

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 88440f1d-4168-11f1-95f7-00a098b42aeb advisory.

https://github.com/libexpat/libexpat/pull/1183 reports:
libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.

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

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

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 310391

File Name: freebsd_pkg_88440f1d416811f195f700a098b42aeb.nasl

Version: 1.1

Type: Local

Family: FreeBSD Local Security Checks

Published: 4/26/2026

Updated: 4/26/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Low

Base Score: 1.2

Temporal Score: 0.9

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

CVSS Score Source: CVE-2026-41080

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:expat, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 4/26/2026

Vulnerability Publication Date: 4/16/2026

Reference Information

CVE: CVE-2026-41080

Detections

Analytics