CVE-2026-42536

HighCVSS 7.5/10Last modified Sep 14, 2026

Description

Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted content

This issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.

Users are recommended to upgrade to version 2.4.68, which fixes the issue.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-122 CWE-120

Affected software

Vendor	Product	Versions
Apache Software Foundation	Apache HTTP Server	>= 2.4.0, <= 2.4.67
Red Hat	JBoss Core Services for RHEL 8	—
Red Hat	JBoss Core Services for RHEL 8	—
Red Hat	JBoss Core Services for RHEL 8	—
Red Hat	JBoss Core Services for RHEL 8	—
Red Hat	JBoss Core Services for RHEL 8	—
Red Hat	JBoss Core Services for RHEL 8	—
Red Hat	Red Hat Enterprise Linux 10	—
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support	—
Red Hat	Red Hat Enterprise Linux 8	—
Red Hat	Red Hat Enterprise Linux 9	—
Red Hat	Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	—
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support	—
Red Hat	Red Hat JBoss Core Services 2.4.62.SP5	—
Red Hat	Red Hat Hardened Images	—
Red Hat	Red Hat Insights proxy 1.5	—
Red Hat	Red Hat Enterprise Linux 6	—
Red Hat	Red Hat Enterprise Linux 7	—

References

Timeline

Published: Jun 8, 2026
Last modified: Sep 14, 2026
NVD status: Modified

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