While 2.16.0 fixed the most critical RCE flaws, it was soon discovered to be vulnerable to a attack (CVE-2021-45105) caused by uncontrolled recursion from self-referential lookups.
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The Log4j 2.16.0 distribution directory contains the full binary and source packages in .zip and .tar.gz formats. log4j 2.16.0 jar download
You can obtain the necessary artifacts via direct download or through major dependency management repositories: While 2