A new Apache Log4j flaw, CVE-2026-49844, makes log4j-api emit invalid JSON from non-finite numbers. Patch to 2.25.5 or 2.26.1 now.
Apache Log4j
Apache Log4j 2.25.4 fixes 4 "silent" flaws, including TLS bypasses and log injection. Secure your infrastructure—upgrade now to prevent data loss.