Apache HTTP/2 RCE: Upgrade to 2.4.67 Now
⚠️ CRITICAL: 30% of the web is running Apache – and this new HTTP/2 RCE (CVE-2026-23918) lets attackers own your server with a single network packet. No authentication needed. No user interaction. If you haven't patched to Apache 2.4.67, you're a ticking bomb.
In this deep-dive breakdown, we dissect the remote code execution vulnerability in Apache HTTP Server's HTTP/2 module (mod_http2). Discovered by Bartlomiej Dmitruk (striga.ai) and Stanislaw Strzalkowski (isec.pl), this is a *double-free memory corruption* triggered by an early stream reset (RST_STREAM frame). The bug is classified as CWE-415 and carries a CVSS score of 8.8 (High) – meaning it's exploitable remotely, with low complexity, and zero privileges required.
We walk through the entire attack vector: why HTTP/2 is the default in modern Apache setups, how an attacker crafts malicious frames to corrupt heap memory, and how that leads to full remote code execution. This isn't just a denial-of-service – it's a complete server takeover.
But wait – there's more. Apache 2.4.67 fixes *over 10 CVEs* in total. We cover the entire batch: AJP proxy heap over-reads (CVE-2026-34059, 34032, 33857), AJP buffer overflow from a malicious backend (CVE-2026-28780), HTTP response splitting (CVE-2026-33523), NULL pointer crash in mod_authn_socache (CVE-2026-33007), digest auth timing bypass (CVE-2026-33006), mod_dav_lock crash (CVE-2026-29169), and mod_md OCSP resource exhaustion (CVE-2026-29168). *Do not cherry-pick patches* – 2.4.67 is the minimum safe version.
*Step-by-step remediation:*
1. *Upgrade now* – No workaround exists for the HTTP/2 RCE.
2. *Temporary mitigation* – Disable HTTP/2 by commenting out `LoadModule http2_module` in httpd.conf.
3. *Verify* – Run `httpd -v` to confirm version 2.4.67.
4. *Apply everywhere* – Dev, staging, production. Attackers are scanning for vulnerable HTTP/2 servers.
5. *Stay informed* – Subscribe to the Apache announce list.
This video is essential for system administrators, DevOps engineers, security professionals, and anyone running Apache on Linux, BSD, or Windows. Protect your infrastructure before the exploits hit the wild.
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💬 **Comment below**: Are you on Apache 2.4.66 or below? What's your upgrade strategy?
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*Timestamps (if applicable):*
0:00 – Intro & severity overview
1:15 – The bug: double-free in HTTP/2
3:00 – Attack vector & CVSS breakdown
5:45 – Full batch of fixes in 2.4.67
8:30 – Remediation steps (upgrade & mitigation)
10:10 – Final warnings & calls to action