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Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process. Improper Encoding or Escaping of Output vulnerability in the RemoteSyslogAppender of Apache log4net. Every character outside visible ASCII and space was removed from the record instead of being escaped, so non-ASCII text and control characters such as tabs disappeared without notice. A party whose data reaches a log message could make a distinct value look identical in the record, for example a user name holding a zero-width space logged as admin. Only applications that use RemoteSyslogAppender are affected. This issue affects Apache log4net: from 1.2.12 before 3.5.0. Users are recommended to upgrade to version 3.5.0, which fixes the issue.
FEDORA-2026-588bc7e01c (log4net-3.5.0-1.fc43 and nant-0.92-43.fc43) has been submitted as an update to Fedora 43. https://bodhi.fedoraproject.org/updates/FEDORA-2026-588bc7e01c
FEDORA-2026-6515ac01d8 (log4net-3.5.0-1.fc45 and nant-0.92-43.fc45) has been submitted as an update to Fedora 45. https://bodhi.fedoraproject.org/updates/FEDORA-2026-6515ac01d8
FEDORA-2026-0bf84c3130 (log4net-3.5.0-1.fc44 and nant-0.92-43.fc44) has been submitted as an update to Fedora 44. https://bodhi.fedoraproject.org/updates/FEDORA-2026-0bf84c3130
FEDORA-2026-6515ac01d8 has been pushed to the Fedora 45 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-6515ac01d8` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-6515ac01d8 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-0bf84c3130 has been pushed to the Fedora 44 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-0bf84c3130` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-0bf84c3130 See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
FEDORA-2026-588bc7e01c has been pushed to the Fedora 43 testing repository. Soon you'll be able to install the update with the following command: `sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-588bc7e01c` You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-588bc7e01c See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.