Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted content This issue affects Apache… (CVE-2026-42536)
A heap-based buffer overflow vulnerability exists in Apache HTTP Server's mod_xml2enc module when processing untrusted content. This affects Apache HTTP Server versions from 2.4.0 through 2.4.67. The issue is addressed in version 2.4.68. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity, and can cause a denial of service due to application crash. Red Hat has released security advisories and patches for affected products including Red Hat Hardened Images and Red Hat Enterprise Linux 10.
AI Analysis
Technical Summary
CVE-2026-42536 is a heap-based buffer overflow vulnerability in the Apache HTTP Server, specifically within the mod_xml2enc module's xml2StartParse function when handling untrusted content. This flaw affects Apache HTTP Server versions 2.4.0 through 2.4.67. Exploitation can lead to denial of service by crashing the server. Red Hat advisories confirm the vulnerability and provide updated packages (httpd 2.4.68) that fix the issue. Multiple Red Hat errata detail the fixes and updates for various architectures and product variants.
Potential Impact
The vulnerability allows an attacker to cause a denial of service by triggering a heap-based buffer overflow in the Apache HTTP Server mod_xml2enc module. There is no indication of confidentiality or integrity impact. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Users should upgrade Apache HTTP Server to version 2.4.68 or later, where this vulnerability is fixed. Red Hat has released updated packages for Red Hat Hardened Images and Red Hat Enterprise Linux 10. Applying these official patches is the recommended remediation. Patch status is confirmed by vendor advisories linked in the references.
Heap-based Buffer Overflow vulnerability in Apache HTTP Server with mod_xml2enc, xml2StartParse, and untrusted content This issue affects Apache… (CVE-2026-42536)
Description
A heap-based buffer overflow vulnerability exists in Apache HTTP Server's mod_xml2enc module when processing untrusted content. This affects Apache HTTP Server versions from 2.4.0 through 2.4.67. The issue is addressed in version 2.4.68. The vulnerability has a CVSS 3.1 base score of 7.5, indicating high severity, and can cause a denial of service due to application crash. Red Hat has released security advisories and patches for affected products including Red Hat Hardened Images and Red Hat Enterprise Linux 10.
CVSS v3.1
Score 7.5high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42536 is a heap-based buffer overflow vulnerability in the Apache HTTP Server, specifically within the mod_xml2enc module's xml2StartParse function when handling untrusted content. This flaw affects Apache HTTP Server versions 2.4.0 through 2.4.67. Exploitation can lead to denial of service by crashing the server. Red Hat advisories confirm the vulnerability and provide updated packages (httpd 2.4.68) that fix the issue. Multiple Red Hat errata detail the fixes and updates for various architectures and product variants.
Potential Impact
The vulnerability allows an attacker to cause a denial of service by triggering a heap-based buffer overflow in the Apache HTTP Server mod_xml2enc module. There is no indication of confidentiality or integrity impact. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Users should upgrade Apache HTTP Server to version 2.4.68 or later, where this vulnerability is fixed. Red Hat has released updated packages for Red Hat Hardened Images and Red Hat Enterprise Linux 10. Applying these official patches is the recommended remediation. Patch status is confirmed by vendor advisories linked in the references.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-2p7m-6jhq-26cm
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-42536"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Patch Information
Threat ID: 6a7b6fd6bf8831d5393eadd3
Added to database: 08/11/2026, 18:54:14 UTC
Last enriched: 08/11/2026, 18:56:45 UTC
Last updated: 08/12/2026, 00:41:12 UTC
Views: 5
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