Vulnerability from bitnami_vulndb
Published
2026-06-10 08:39
Modified
2026-09-15 09:01
Summary
Apache HTTP Server: mod_xml2enc heap overflow
Details

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.

To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "apache",
        "purl": "pkg:bitnami/apache"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.4.0"
            },
            {
              "fixed": "2.4.68"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42536"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*"
    ],
    "severity": "High"
  },
  "details": "Heap-based Buffer Overflow vulnerability in Apache HTTP Server with\u00a0mod_xml2enc, xml2StartParse, and untrusted content\n\nThis issue affects Apache HTTP Server: from 2.4.0 through 2.4.67.\n\nUsers are recommended to upgrade to version 2.4.68, which fixes the issue.",
  "id": "BIT-apache-2026-42536",
  "modified": "2026-09-15T09:01:14.338Z",
  "published": "2026-06-10T08:39:14.858Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/08/9"
    },
    {
      "type": "ADVISORY",
      "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42536"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:34109"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-42536"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2486411"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42536.json"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:25042"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:41906"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:42828"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:47046"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:53371"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:56868"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:56869"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:62165"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:66323"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:67152"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Apache HTTP Server: mod_xml2enc heap overflow"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.