CVE-2026-23918

HIGHNVD 8.88.8—

8.8

Double Free and possible RCE vulnerability in Apache HTTP Server with the HTTP/2 protocol.

This issue affects Apache HTTP Server: 2.4.66.

Users are recommended to upgrade to version 2.4.67, which fixes the issue.

CVSS v3: 8.8
EG Score: 8.8(high)
EPSS: 15.5%
KEV: Not listed

Published

May 4, 2026

Last Modified

May 4, 2026

Advisory Details (1)

Auto-updated May 4, 2026

⚠️ Active exploitation confirmed. Patch available.

generic Patch Available🔴 Active Exploitation

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

https://httpd.apache.org/security/vulnerabilities_24.html

Vendor Advisories for CVE-2026-23918(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2026-23918
Microsoft Security Response Center (MSRC)
Apache HTTP Server: http2: double free and possible RCE on early reset

Frequently asked(5)

What is CVE-2026-23918?

CVE-2026-23918 is a high vulnerability published on May 4, 2026. Double Free and possible RCE vulnerability in Apache HTTP Server with the HTTP/2 protocol. This issue affects Apache HTTP Server: 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.

When was CVE-2026-23918 disclosed?

CVE-2026-23918 was first published in the National Vulnerability Database on May 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-23918 actively exploited?

CVE-2026-23918 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-23918?

CVE-2026-23918 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2026-23918?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23918, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2026-23918

📅 Published

🔄 Last Modified

📋 Advisory Details (1)

Apache HTTP Server 2.4 vulnerabilities - The Apache HTTP Server Project

📣 Vendor Advisories for CVE-2026-23918(1)

❓ Frequently asked(5)