CVE-2026-42536

Summary

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.

Affected Software

Weaknesses

• CWE-122: CWE-122 Heap-based Buffer Overflow

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2026/06/08/9

httpd: Apache HTTP Server: Heap-based Buffer Overflow via untrusted content in mod_xml2enc

Additional References

• https://access.redhat.com/security/cve/CVE-2026-42536
• https://bugzilla.redhat.com/show_bug.cgi?id=2486411
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42536.json
• https://access.redhat.com/errata/RHSA-2026:34109

References

• https://httpd.apache.org/security/vulnerabilities_24.html

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