SUSE SLED15 / SLES15 Security Update : log4j (SUSE-SU-2026:1843-1)

medium Nessus Plugin ID 315047

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1843-1 advisory.

- CVE-2026-34477: TLS connections vulnerable to interception due to incomplete hostname verification configuration checks (bsc#1262050).
- CVE-2026-34479: silent log event loss due to improper XML escaping in `Log4j1XmlLayout` (bsc#1262091).
- CVE-2026-34480: silent log event loss due to improper XML escaping in `XmlLayout` (bsc#1262092).
- CVE-2026-34481: silent log event loss due to improper serialization of non-finite floating-point values in `JsonTemplateLayout` (bsc#1262093).

Tenable has extracted the preceding description block directly from the SUSE 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 log4j, log4j-javadoc, log4j-jcl and / or log4j-slf4j packages.

Plugin Details

Severity: Medium

ID: 315047

File Name: suse_SU-2026-1843-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 5/16/2026

Updated: 5/16/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

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-2026-34481

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: Medium

Base Score: 6.9

Threat Score: 5.5

Threat Vector: CVSS:4.0/E:P

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

CVSS Score Source: CVE-2026-34480

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:log4j-jcl, p-cpe:/a:novell:suse_linux:log4j-slf4j, p-cpe:/a:novell:suse_linux:log4j-javadoc, p-cpe:/a:novell:suse_linux:log4j, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/13/2026

Vulnerability Publication Date: 4/10/2026

Reference Information

CVE: CVE-2026-34477, CVE-2026-34479, CVE-2026-34480, CVE-2026-34481

SuSE: SUSE-SU-2026:1843-1

Detections

Analytics