RHLW-2026-a08954ef69e23d40

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Source
https://github.com/project-lightwell/lightwell-osv/blob/main/advisories/RHLW-2026-a08954ef69e23d40.json
Import Source
https://github.com/project-lightwell/lightwell-osv/blob/main/advisories/RHLW-2026-a08954ef69e23d40.json
JSON Data
https://api.osv.dev/v1/vulns/RHLW-2026-a08954ef69e23d40
Upstream
CVE (7)
GHSA (5)
Published
2026-10-12T16:52:49Z
Modified
2026-10-27T04:13:05Z
Severity
  • 5.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L/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:L/U:Clear CVSS Calculator
Summary
Lightwell Security Advisory: logback-core 1.2.11.rhlw-00001
Details

Red Hat Lightwell has released ch.qos.logback:logback-core 1.2.11.rhlw-00001 with backported fixes for CVE-2023-6378, CVE-2024-12798, CVE-2024-12801, CVE-2025-11226, CVE-2026-10532, CVE-2026-1225, and CVE-2026-9828.

CVE-2023-6378: Logback "receiver" DOS vulnerability

CVE-2024-12798: ACE vulnerability in JaninoEventEvaluator by QOS.CH logback-core upto including version 0.1 to 1.3.14 and 1.4.0 to 1.5.12 in Java applications allows attacker to execute arbitrary code by compromising an existing logback configuration file or by injecting an environment variable before program execution.

Malicious logback configuration files can allow the attacker to execute arbitrary code using the JaninoEventEvaluator extension.

A successful attack requires the user to have write access to a configuration file. Alternatively, the attacker could inject a malicious environment variable pointing to a malicious configuration file. In both cases, the attack requires existing privilege.

CVE-2024-12801: Server-Side Request Forgery (SSRF) in SaxEventRecorder by QOS.CH logback version 0.1 to 1.3.14 and 1.4.0 to 1.5.12  on the Java platform, allows an attacker to forge requests by compromising logback configuration files in XML.

The attacks involves the modification of DOCTYPE declaration in  XML configuration files.

CVE-2025-11226: ACE vulnerability in conditional configuration file processing by QOS.CH logback-core up to and including version 1.5.18 in Java applications, allows an attacker to execute arbitrary code by compromising an existing logback configuration file or by injecting an environment variable before program execution.

A successful attack requires the presence of Janino library and Spring Framework to be present on the user's class path. In addition, the attacker must  have write access to a configuration file. Alternatively, the attacker could inject a malicious environment variable pointing to a malicious configuration file. In both cases, the attack requires existing privilege.

CVE-2026-10532: Logback deserialization whitelist bypass for Proxy objects

CVE-2026-1225: ACE vulnerability in configuration file processing by QOS.CH logback-core up to and including version 1.5.24 in Java applications, allows an attacker to instantiate classes already present on the class path by compromising an existing logback configuration file.

The instantiation of a potentially malicious Java class requires that said class is present on the user's class-path. In addition, the attacker must have write access to a configuration file. However, after successful instantiation, the instance is very likely to be discarded with no further ado.

CVE-2026-9828: Logback deserialization whitelist bypass for java.lang and java.util

This patched artifact is a drop-in replacement for ch.qos.logback:logback-core 1.2.11 from Maven Central.

References
Credits
    • Red Hat Lightwell - REMEDIATION_DEVELOPER

Affected packages

Red Hat Lightwell:Maven / ch.qos.logback:logback-core

Package

Name
ch.qos.logback:logback-core
Purl
pkg:maven/ch.qos.logback/logback-core

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.2.11.rhlw-00001

Affected versions

0.*
0.2.5
0.3
0.5
0.6
0.7
0.7.1
0.8
0.8.1
0.9
0.9.1
0.9.2
0.9.3
0.9.4
0.9.5
0.9.6
0.9.7
0.9.8
0.9.9
0.9.10
0.9.11
0.9.12
0.9.13
0.9.14
0.9.15
0.9.16
0.9.17
0.9.18
0.9.19
0.9.20
0.9.21
0.9.22
0.9.23
0.9.24
0.9.25
0.9.26
0.9.27
0.9.28
0.9.29
0.9.30
1.*
1.0.0
1.0.1
1.0.2
1.0.3
1.0.4
1.0.5
1.0.6
1.0.7
1.0.8
1.0.9
1.0.10
1.0.11
1.0.12
1.0.13
1.1.0
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.1.6
1.1.7
1.1.8
1.1.9
1.1.10
1.1.11
1.2.0
1.2.1
1.2.2
1.2.3
1.2.4
1.2.4-groovyless
1.2.5
1.2.6
1.2.7
1.2.8
1.2.9
1.2.10
1.2.11

Database specific

lightwell 
{
    "backport_base_version":  "1.2.11",
    "remediated_version":  "1.2.11.rhlw-00001",
    "repository_url":  "https://packages.redhat.com/lightwell/java/remediated/"
}
source 
"https://github.com/project-lightwell/lightwell-osv/blob/main/advisories/RHLW-2026-a08954ef69e23d40.json"