Releasing Icinga 2 v2.16.4

by | Jun 16, 2026

Today, we are announcing the availability of Icinga 2 v2.16.4. This release contains a number of fixes for various smaller but annoying bugs, including one regression regarding API authentication with certain HTTP client libraries. It also ensures that Icinga 2 is compatible with newer OpenSSL versions.

Bugfixes

  • Track objects deleted at runtime to avoid erroneous recreation when processing the replay log (#10933)
  • Ensure that connecting to endpoints can no longer hang indefinitely, which had stopped it from initiating further connection attempts until Icinga 2 was restarted (#10929)
  • Fix a regression introduced with v2.16.0, that broke API authentication for clients that only send HTTP Basic Auth credentials after the server requested them (#10927)
  • Improve locking of performance data arrays to prevent possible deadlocks (#10930)
  • Fix high response latency with multiple API requests targeting non-existent hosts or services (#10928)

Enhancements and Documentation

  • Add support for OpenSSL 4.0 (#10934)
  • Remove Amazon Linux 2 from the documentation after it has reached its end of life (#10935)

You May Also Like…

 

Icinga Director 1.12 Release

Icinga Director 1.12 Release

Icinga Director 1.12 is out now. Icinga Director 1.12.0 finally gives custom variables full support for dictionaries,...

Icinga TOTP Web 1.0.0 Release

Icinga TOTP Web 1.0.0 Release

We are releasing Icinga TOTP Web v1.0.0, which adds Time-based One-Time Password (TOTP) two-factor authentication to...

Subscribe to our Newsletter

A monthly digest of the latest Icinga news, releases, articles and community topics.