Detections
Analytics

Oracle Linux 9 : expat (ELSA-2026-72663)

high Nessus Plugin ID 351126

Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-72663 advisory.

 - Fix CVE-2026-66046: dtdCopy out-of-bounds access via isCdata hash lookup
 - CVE-2026-93990 expat: Expat: XML Injection via Malformed UTF-16 Input

Tenable has extracted the preceding description block directly from the Oracle Linux 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

Update the affected expat and / or expat-devel packages.

See Also

https://linux.oracle.com/errata/ELSA-2026-72663.html

Plugin Details

Severity: High

ID: 351126

File Name: oraclelinux_ELSA-2026-72663.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/29/2026

Updated: 9/29/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.19

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-93990

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 7.7

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

CPE: cpe:/o:oracle:linux:9, cpe:/o:oracle:linux:9:8:baseos_patch, p-cpe:/a:oracle:linux:expat-devel, p-cpe:/a:oracle:linux:expat

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 8/18/2026

Reference Information

CVE: CVE-2026-66046, CVE-2026-93990

IAVA: 2026-A-0925-S, 2026-A-1045