SUSE 2026-1843-1 Log4j Moderate Vulnerability With Four Key Fixes
suse
May 13, 2026
An update that solves four vulnerabilities can now be installed.
Summary
## This update for log4j fixes the following issues: * 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). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * Basesystem Module 15-SP7
Topics Covered
References
* bsc#1262050
* bsc#1262091
* bsc#1262092
* bsc#1262093
Cross-
* CVE-2026-34477
* CVE-2026-34479
* CVE-2026-34480
* CVE-2026-34481
CVSS scores:
* CVE-2026-34477 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
* CVE-2026-34477 ( NVD ): 6.3
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
* CVE-2026-34477 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
* CVE-2026-34479 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
* CVE-2026-34479 ( NVD ): 6.9
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Announcement ID: SUSE-SU-2026:1843-1
Release Date: 2026-05-13T15:24:58Z
Rating: moderate
Topics Covered
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