Logback 1.5.28

2026-02-06 Release of logback version 1.5.28

• Appender names or appender references are no longer subject to variable substitution.

• Fixed issue with configurations with conditionals encompassing appenders. This was reported in issues/1016 reported by Sergey Sazonov.

• The element now admits a 'scan' attribute which can be used to override the 'scan' attribute in the element.

• Fixed NullPointerException thrown by VersionUtil.checkForVersionEquality method occurring with GraalVM Native Images. This issue was reported in issues/1014.

• A bit-wise identical binary of this version can be reproduced by building from source code at commit e7a1855ab562bb102333f754603ff89359bf3cfc associated with the tag v_1.5.28. Release built using Java "21" 2023-10-17 LTS build 21.0.1.+12-LTS-29 under Linux Debian 11.6.

Logback 1.5.27

2026-01-30 Release of logback version 1.5.27

• Updated license to Eclipse Public License version 2.0 from version 1.0, retaining the GPL 2.1 dual-license.

• Fixed missing MDC data transmitted by SocketAppender reported in issues/1010 by Lars Vogel.

• Removed all Receiver classes and components which were already disabled for several years.

• Refactored file scanning code for improved clarity.

• In SizeAndTimeBasedRollingPolicy modified totalSizeCap and maxFileSize comparison to taking into account file compression. This fixes issues/1007.

• A bit-wise identical binary of this version can be reproduced by building from source code at commit 3618eb01aad6672f9cd250dccf7546a69cbe982f associated with the tag v_1.5.27. Release built using Java "21" 2023-10-17 LTS build 21.0.1.+12-LTS-29 under Linux Debian 11.6.

Logback 1.5.26

2026-01-25 Release of logback version 1.5.26

• InsertFromJNDIModelHandler was accessing javax.naming package forcing the inclusion of the optional java.naming module. This problem was raised in issues/1003 by Marius Hanl who also provided the relevant PR.

• In applications using shadow/fat/shade jars, module or package information could be lost. Thus, in the absence of version information, logback-classic would warn about version mismatches. Logback components now ship with properties files containing version information that survive shadow/fat/shade jars. This issue was reporteed in issues/1002 by Christoph Gritschenberger.

• A bit-wise identical binary of this version can be reproduced by building from source code at commit 33deb54506bbfaf1ff151f26f3a5f86936011619 associated with the tag v_1.5.26. Release built using Java "21" 2023-10-17 LTS build 21.0.1.+12-LTS-29 under Linux Debian 11.6.

Logback 1.5.25

2026-01-17 Release of logback version 1.5.25

• When processing configuration files, logback-core will now only instantiate components compatible with the class expected by the encapsulating class. This fixes an ACE vulnerability recorded as CVE-2026-1225.

• In configuration files, referencing a single undeclared appender would cause all referenced appenders to be skipped. This issue was discovered in issues/997.

• Added VersionUtil class to logback-core. This utility class checks for version compatibility issues and alerts the user if need be.

• Added EpochConverter to output milliseconds/seconds since epoch. This enhancement was requested by Duncan Jauncey in issues/1000 who also provided the relevant implementation PR.

• A bit-wise identical binary of this version can be reproduced by building from source code at commit f426e0002800cfb507f393fcacffe0761a425220 associated with the tag v_1.5.25. Release built using Java "21" 2023-10-17 LTS build 21.0.1.+12-LTS-29 under Linux Debian 11.6.