Critical Apache HTTP/2 Double-Free May Enable RCE Now
⚠ Apache Software Foundation released updates to address CVE-2026-23918, a high-severity (CVSS 8.8) double-free bug in mod_http2 that can cause denial-of-service and potentially remote code execution. The flaw impacts Apache HTTP Server 2.4.66 and is fixed in 2.4.67. Researchers provided an x86_64 proof-of-concept and warned the RCE path is practical on systems using APR with the mmap allocator. Administrators should upgrade or mitigate by disabling mod_http2 or using the prefork MPM until patched.
