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Critical Apache HTTP/2 Flaw Could Let Unauthenticated Attackers Execute Code Remotely

Apache HTTP Server 2.4.71 fixes a critical heap corruption flaw in mod_http2 that could allow unauthenticated remote code execution.

By · Published November 12, 2026  10:16 UTC · Updated November 12, 2026  10:16 UTC

5sources
5articles
14velocity
+0%since first seen
2h agofirst detected
Text:
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The brief

⚡ Executive Intelligence Takeaways Corroborated across 5 independent newsrooms
  • Velocity & Diffusion: Coverage exploded across 5 distinct news outlets with 5 published articles, achieving a live velocity of 14.
  • Primary Driver: Apache HTTP Server 2.4.71 fixes a critical heap corruption flaw in mod_http2 that could allow unauthenticated remote code execution.
  • Source Integrity: Verified strictly against primary headline reporting under zero-hallucination protocols.

The Apache HTTP Server Project released version 2.4.71 on November 11, 2026, to address CVE-2026-119618, a critical vulnerability in the mod_http2 module's assign_headers() function. Apache rates the flaw as critical and describes it as a concurrent execution issue using a shared resource with improper synchronization that can lead to remote code execution. The vulnerability affects Apache HTTP Server versions 2.4.55 through 2.4.70 and standalone mod_h2 releases 2.0.8 through 2.0.42.

Two independent research groups reported the issue: Anthropic's OSS Scanner on October 26, 2026, and Google Cloud Vulnerability Research researchers Anthony Weems and Simon Scannell on November 3, 2026. Apache fixed the bug in commit 824beab9b9424d6cfb29595248fdbf6c3dddeab1 before releasing version 2.4.71. The CVE.org record, published by the Apache CNA, lists CWE-362 and repeats Apache's description verbatim.

Apache's advisory does not discuss exploitation, attacker preconditions, or whether authentication is required. As of November 11, 2026, CVE-2026-119618 was not listed in CISA's Known Exploited Vulnerabilities catalog (catalogVersion 2026.11.10). No CVSS score or vector has been published by Apache or NVD, which shows the entry in "Received" status.

The same 2.4.71 release also fixes CVE-2026-106023, rated important, a NULL pointer dereference in mod_md affecting versions 2.4.30 through 2.4.70, and CVE-2026-109163, rated low, in mod_vhost_alias affecting versions 2.4.69 and 2.4.70. Apache has published no workaround for CVE-2026-119618; the only remediation is upgrading to 2.4.71 from the official download page.

Distribution packages follow their own schedules. As of November 11, Debian's security tracker listed apache2 2.4.71-1 as fixed in unstable, while bookworm, trixie, and forky remained marked vulnerable. No Ubuntu or Red Hat CVE pages were available at that time. The standalone icing/mod_h2 project's latest release remained v2.0.42 from May 29, 2026, with no mention of CVE-2026-119618 in its ChangeLog.

This vulnerability is distinct from CVE-2026-23918, an earlier mod_http2 double-free flaw fixed in version 2.4.66. Apache has published no indicators of compromise or detection guidance for CVE-2026-119618.

Synthesized by Archynetys from the headlines below under a strict no-invention contract. Updated 1h ago.

The reporting (5)

Quick answers

Which Apache HTTP Server versions are affected by CVE-2026-119618?

Apache HTTP Server versions 2.4.55 through 2.4.70 are affected, as well as standalone mod_h2 releases 2.0.8 through 2.0.42.

Has CVE-2026-119618 been exploited in the wild?

As of November 11, 2026, CVE-2026-119618 was not listed in CISA's Known Exploited Vulnerabilities catalog, and Apache's advisory does not discuss exploitation, known attacks, or proof-of-concept code.

What is the fix for CVE-2026-119618?

The fix is upgrading to Apache HTTP Server 2.4.71, released on November 11, 2026. Apache has published no workaround for this vulnerability.

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Topics

Apache HTTP Server CVE-2026-119618 mod_http2 remote code execution heap corruption cybersecurity

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