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Priority reviewHigh

CVE-2026-23918

Apache Software Foundation Apache HTTP Server, Red Hat Hardened Images, Red Hat Enterprise Linux 10

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
EPSS
49.7%
98.8% percentile
CISA KEV
Not listed
Published
2026.05.05
PRIORITY ASSESSMENT

Priority review

FIRST EPSS indicates an elevated probability of exploitation.

Known exploitationNot established by KEV
Exploit probability49.7%
Technical severityCVSS 8.8

Vulnerability overview

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.

Affected product and versions

Product
Apache Software Foundation Apache HTTP Server, Red Hat Hardened Images, Red Hat Enterprise Linux 10
Affected versions
>= 2.4.66, 2.4.66
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Apache Software Foundation Apache HTTP Server, Red Hat Hardened Images, Red Hat Enterprise Linux 10 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-1341, CWE-415