# CVE-2026-42536

## Summary

- **CVE ID:** CVE-2026-42536
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-122
- **Published:** Jun 8, 2026
- **Last 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.

## Affected Products

- Apache Software Foundation — Apache HTTP Server (2.4.0)

## References

- [CNA](https://httpd.apache.org/security/vulnerabilities_24.html)
- [CVE](http://www.openwall.com/lists/oss-security/2026/06/08/9)
- [redhat-SADP](https://access.redhat.com/security/cve/CVE-2026-42536)
- [redhat-SADP](https://bugzilla.redhat.com/show_bug.cgi?id=2486411)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42536.json)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:34109)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:25042)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:41906)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:42828)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:47046)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:53371)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:56868)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:56869)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:62165)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:66323)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:67152)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.02%
- **EPSS Percentile:** 61.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._