CVE-2026-42536
Published: June 11, 2026Last modified: June 22, 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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | apache2 | Fixed (2.4.68-r0) |
| 25 LTS | apache2 | Fixed (2.4.68-r0) | |
| Stream | apache2 | Fixed (2.4.68-r0) |
References
- http://www.openwall.com/lists/oss-security/2026/06/08/9
- https://access.redhat.com/errata/RHSA-2026:25042
- https://access.redhat.com/errata/RHSA-2026:34109
- https://access.redhat.com/security/cve/CVE-2026-42536
- https://bugzilla.redhat.com/show_bug.cgi?id=2486411
- https://httpd.apache.org/security/vulnerabilities_24.html
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42536.json