A security vulnerability was found in zlib: https://nakedsecurity.sophos.com/2022/03/29/zlib-data-compressor-fixes-17-year-old-security-bug-patch-errr-now/

This has been fixed in zlib 1.2.12. The next releases of Firebird 3 and 4 should include this updated version.

https://nvd.nist.gov/vuln/detail/CVE-2018-25032