High 7.5Published Jun 8, 2026

CVE-2026-42536Apache HTTP Server: mod_xml2enc heap overflow

Updated under an hour ago (Oct 26, 2026, 11:40 PM ET)

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It affects Apache Software Foundation Apache HTTP Server and 8 other products. Add what you run to find out whether that includes you.

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Every CVE for Apache Software Foundation Apache HTTP Server

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-122, CWE-120
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Modified
Record last updated: Sep 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache HTTP Server apache_software_foundation:apache_http_server (from the name)	from 2.4.0 through 2.4.67	CNA record
Red Hat JBoss Core Services for RHEL 8 redhat:jboss_core_services	from 0:2.4.62-16.el8jbcs not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 0:2.4.63-13.el10_2.4 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 0:2.4.63-1.el10_0.4 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions redhat:rhel_e4s	from 0:2.4.57-11.el9_4.5 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus	from 0:2.4.62-4.el9_6.6 not affected	CISA ADP
Red Hat Red Hat Hardened Images redhat:hummingbird	from 2.4.68-1.hum1 not affected	CISA ADP
Red Hat Red Hat Insights proxy 1.5 redhat:insights_proxy	from 1786433656 not affected	CISA ADP
apache http_server apache:http_server	from 2.4.0 before 2.4.68	NVD

References

References

https://httpd.apache.org/security/vulnerabilities_24.html	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/06/08/9	mailing-list, third-party-advisory
https://access.redhat.com/errata/RHSA-2026:25042
https://access.redhat.com/errata/RHSA-2026:34109
https://access.redhat.com/errata/RHSA-2026:41906
https://access.redhat.com/errata/RHSA-2026:42828
https://access.redhat.com/errata/RHSA-2026:47046
https://access.redhat.com/errata/RHSA-2026:53371
https://access.redhat.com/errata/RHSA-2026:56868
https://access.redhat.com/errata/RHSA-2026:56869
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.