Critical RCE Vulnerability in Apache HTTP Server
A critical race condition vulnerability (CVE-2026-119618) has been discovered in the Apache HTTP Server's mod_http2 module. This flaw allows remote, unauthenticated attackers to potentially achieve arbitrary code execution through heap memory corruption.
Why it matters
Given that 64% of cloud environments are potentially vulnerable, this poses a significant risk to global web infrastructure and cloud-based microservices.
A critical synchronization vulnerability (CVE-2026-119618) has been identified in Apache HTTP Server’s HTTP/2 module (mod_http2). The flaw stems from a concurrent execution race condition within the assign_headers() function when handling shared resources. If successfully exploited, a remote, unauthenticated attacker can corrupt heap memory to achieve arbitrary code execution (RCE).
As of the time of this blog’s publication, no exploit is available and there are no reports of exploitation in the wild.
CVE-2026-119618 is a critical, high-severity vulnerability involving a race condition in the Apache HTTP Server, which was independently discovered by Anthropic and Google Cloud’s Vulnerability Research Team.
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