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CVE-2026-23918

CVE-2026-23918 · Apache HTTP Server: http2: double free and possible RCE on early reset

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 8.8 · High · EPSS 49.7% · Public exploit · Fix available

Published
Updated

Stack: system · web

Affected products and versions

  • apache httpd

    Versions
    • 2.4.66: Affected (semver)

    No fix published

  • apache2 Debian:12

    Versions
    • 2.4.57-2
    • 2.4.57-3
    • 2.4.58-1
    • 2.4.59-1
    • 2.4.59-1~deb10u1
    • 2.4.59-1~deb11u1
    • 2.4.59-1~deb12u1
    • 2.4.59-2
    • 2.4.60-1
    • 2.4.61-1
    • 2.4.61-1~deb11u1
    • 2.4.61-1~deb12u1
    • 2.4.62-1
    • 2.4.62-1~deb11u1
    • 2.4.62-1~deb11u2
    • 2.4.62-1~deb12u1
    • 2.4.62-1~deb12u2
    • 2.4.62-2
    • 2.4.62-3
    • 2.4.62-4
    • 2.4.62-5
    • 2.4.62-6
    • 2.4.63-1
    • 2.4.64-1
    • 2.4.65-1
    • 2.4.65-1~deb11u1
    • 2.4.65-1~deb12u1
    • 2.4.65-2
    • 2.4.65-3
    • 2.4.66-1
    • 2.4.66-1~deb11u1
    • 2.4.66-1~deb12u1
    • 2.4.66-1~deb12u2
    • 2.4.66-1~deb13u1
    • 2.4.66-1~deb13u2
    • 2.4.66-2
    • 2.4.66-3
    • 2.4.66-4
    • 2.4.66-5
    • 2.4.66-6
    • 2.4.66-7
    • 2.4.66-8
    • 2.4.67-1~deb11u1
    • 2.4.67-1~deb11u2
    • 2.4.67-1~deb11u3
    • 2.4.67-1~deb12u1
    Affected ranges
    • ECOSYSTEM: < 2.4.67-1~deb12u2

    Update to 2.4.67-1~deb12u2

  • apache2 Debian:13

    Versions
    • 2.4.65-2
    • 2.4.65-3
    • 2.4.66-1~deb11u1
    • 2.4.66-1~deb12u1
    • 2.4.66-1~deb12u2
    • 2.4.66-1~deb13u1
    Affected ranges
    • ECOSYSTEM: < 2.4.66-1~deb13u2

    Update to 2.4.66-1~deb13u2

  • apache2 Debian:14

    Versions
    • 2.4.65-2
    • 2.4.65-3
    • 2.4.66-1
    • 2.4.66-1~deb11u1
    • 2.4.66-1~deb12u1
    • 2.4.66-1~deb12u2
    • 2.4.66-1~deb13u1
    • 2.4.66-1~deb13u2
    • 2.4.66-2
    • 2.4.66-3
    • 2.4.66-4
    Affected ranges
    • ECOSYSTEM: < 2.4.66-5

    Update to 2.4.66-5

  • apache2 Ubuntu:26.04:LTS

    Versions
    • 2.4.64-1ubuntu3
    • 2.4.65-3ubuntu1
    • 2.4.66-2ubuntu1
    • 2.4.66-2ubuntu2
    Affected ranges
    • ECOSYSTEM: < 2.4.66-2ubuntu2.1

    Update to 2.4.66-2ubuntu2.1

Original sources

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