Priority reviewHigh

CVE-2026-49975

Apache Software Foundation Apache HTTP Server, JBoss Core Services for RHEL 8, JBoss Core Services on RHEL 7

Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.

CVSS
7.5
EPSS
28.0%
97.9% percentile
CISA KEV
Not listed
Published
2026.06.09
PRIORITY ASSESSMENT

Priority review

FIRST EPSS indicates an elevated probability of exploitation.

Known exploitationNot established by KEV
Exploit probability28.0%
Technical severityCVSS 7.5

Vulnerability overview

Memory Allocation with Excessive Size Value vulnerability in Apache HTTP Server's mod_http leads to denial of service via malicious HTTP requests. This issue affects Apache HTTP Server: from 2.4.17 through 2.4.67.

Affected product and versions

Product
Apache Software Foundation Apache HTTP Server, JBoss Core Services for RHEL 8, JBoss Core Services on RHEL 7
Affected versions
>= 2.4.17 <= 2.4.67, >= 2.4.17 < 2.4.68, 11.0
Fixed versions
2.4.68

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, JBoss Core Services for RHEL 8, JBoss Core Services on RHEL 7 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:N/UI:N/S:U/C:N/I:N/A:H
CWE
CWE-409, CWE-789
CVE-2026-49975 — Apache Software Foundation Apache HTTP Server, JBoss Core Services for RHEL 8, JBoss Core Services on RHEL 7 | SECUFOCUS NOW