The Apache Software Foundation has released updates to fix a critical vulnerability (CVE-2026-23918) in Apache HTTP Server 2.4.66 that allows denial-of-service (DoS) attacks and potential remote code execution (RCE) via a double-free bug in HTTP/2 protocol handling. The flaw can be exploited by sending specific HTTP/2 frames, with the RCE path particularly feasible on systems using the default Apache Portable Runtime mmap allocator, leading to high risk for widely deployed servers.
https://thehackernews.com/2026/05/critical-apache-http2-flaw-cve-2026.html