ubuntu-cve-2026-45104
Vulnerability from osv_ubuntu
Published
2026-05-27 20:16
Modified
2026-06-11 13:05
Summary
Details

MapServer is a system for developing web-based GIS applications. From 6.4.0 to before 8.6.3, msSLDParseUserStyle always calls _SLDApplyRuleValues(psRule, psLayer, 1); for any carrying — it assumes msSLDParseRule added one class. When the rule has no symbolizer (a structurally valid SLD), msSLDParseRule adds zero, and _SLDApplyRuleValues ends up indexing _class[-1], resulting in a NULL pointer dereference. A 200-byte well-formed SLD via the WMS SLD_BODY= parameter is enough to trigger this, no auth required. This vulnerability is fixed in 8.6.3.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cgi-mapserver",
            "binary_version": "7.0.0-9ubuntu3.1"
          },
          {
            "binary_name": "libmapscript-java",
            "binary_version": "7.0.0-9ubuntu3.1"
          },
          {
            "binary_name": "libmapscript-perl",
            "binary_version": "7.0.0-9ubuntu3.1"
          },
          {
            "binary_name": "libmapserver2",
            "binary_version": "7.0.0-9ubuntu3.1"
          },
          {
            "binary_name": "mapserver-bin",
            "binary_version": "7.0.0-9ubuntu3.1"
          },
          {
            "binary_name": "python-mapscript",
            "binary_version": "7.0.0-9ubuntu3.1"
          },
          {
            "binary_name": "ruby-mapscript",
            "binary_version": "7.0.0-9ubuntu3.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "mapserver",
        "purl": "pkg:deb/ubuntu/mapserver@7.0.0-9ubuntu3.1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.0.0-4build1",
        "7.0.0-5ubuntu1",
        "7.0.0-7",
        "7.0.0-8",
        "7.0.0-8build1",
        "7.0.0-9",
        "7.0.0-9ubuntu1",
        "7.0.0-9ubuntu2",
        "7.0.0-9ubuntu3",
        "7.0.0-9ubuntu3.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cgi-mapserver",
            "binary_version": "7.0.7-1build2"
          },
          {
            "binary_name": "libmapscript-java",
            "binary_version": "7.0.7-1build2"
          },
          {
            "binary_name": "libmapscript-perl",
            "binary_version": "7.0.7-1build2"
          },
          {
            "binary_name": "libmapserver2",
            "binary_version": "7.0.7-1build2"
          },
          {
            "binary_name": "mapserver-bin",
            "binary_version": "7.0.7-1build2"
          },
          {
            "binary_name": "python-mapscript",
            "binary_version": "7.0.7-1build2"
          },
          {
            "binary_name": "ruby-mapscript",
            "binary_version": "7.0.7-1build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "mapserver",
        "purl": "pkg:deb/ubuntu/mapserver@7.0.7-1build2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.0.6-2build1",
        "7.0.7-1",
        "7.0.7-1build1",
        "7.0.7-1build2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cgi-mapserver",
            "binary_version": "7.4.3-2build1"
          },
          {
            "binary_name": "libmapscript-java",
            "binary_version": "7.4.3-2build1"
          },
          {
            "binary_name": "libmapscript-perl",
            "binary_version": "7.4.3-2build1"
          },
          {
            "binary_name": "libmapserver2",
            "binary_version": "7.4.3-2build1"
          },
          {
            "binary_name": "mapserver-bin",
            "binary_version": "7.4.3-2build1"
          },
          {
            "binary_name": "php-mapscript",
            "binary_version": "7.4.3-2build1"
          },
          {
            "binary_name": "php-mapscript-ng",
            "binary_version": "7.4.3-2build1"
          },
          {
            "binary_name": "python3-mapscript",
            "binary_version": "7.4.3-2build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "mapserver",
        "purl": "pkg:deb/ubuntu/mapserver@7.4.3-2build1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.4.1-1build1",
        "7.4.1-1build3",
        "7.4.2-1",
        "7.4.2-1build1",
        "7.4.3-1",
        "7.4.3-1build2",
        "7.4.3-2",
        "7.4.3-2build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cgi-mapserver",
            "binary_version": "7.6.4-2build2"
          },
          {
            "binary_name": "libmapscript-java",
            "binary_version": "7.6.4-2build2"
          },
          {
            "binary_name": "libmapscript-perl",
            "binary_version": "7.6.4-2build2"
          },
          {
            "binary_name": "libmapserver2",
            "binary_version": "7.6.4-2build2"
          },
          {
            "binary_name": "mapserver-bin",
            "binary_version": "7.6.4-2build2"
          },
          {
            "binary_name": "python3-mapscript",
            "binary_version": "7.6.4-2build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "mapserver",
        "purl": "pkg:deb/ubuntu/mapserver@7.6.4-2build2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.6.3-1~exp1ubuntu1",
        "7.6.4-2",
        "7.6.4-2build2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cgi-mapserver",
            "binary_version": "8.0.1-4ubuntu2"
          },
          {
            "binary_name": "libmapscript-java",
            "binary_version": "8.0.1-4ubuntu2"
          },
          {
            "binary_name": "libmapscript-perl",
            "binary_version": "8.0.1-4ubuntu2"
          },
          {
            "binary_name": "libmapserver2t64",
            "binary_version": "8.0.1-4ubuntu2"
          },
          {
            "binary_name": "mapserver-bin",
            "binary_version": "8.0.1-4ubuntu2"
          },
          {
            "binary_name": "php-mapscript-ng",
            "binary_version": "8.0.1-4ubuntu2"
          },
          {
            "binary_name": "python3-mapscript",
            "binary_version": "8.0.1-4ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "mapserver",
        "purl": "pkg:deb/ubuntu/mapserver@8.0.1-4ubuntu2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.0.1-2build1",
        "8.0.1-2build2",
        "8.0.1-2build3",
        "8.0.1-2build5",
        "8.0.1-4ubuntu1",
        "8.0.1-4ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cgi-mapserver",
            "binary_version": "8.4.0-4build1"
          },
          {
            "binary_name": "libmapscript-java",
            "binary_version": "8.4.0-4build1"
          },
          {
            "binary_name": "libmapscript-perl",
            "binary_version": "8.4.0-4build1"
          },
          {
            "binary_name": "libmapserver2t64",
            "binary_version": "8.4.0-4build1"
          },
          {
            "binary_name": "mapserver-bin",
            "binary_version": "8.4.0-4build1"
          },
          {
            "binary_name": "php-mapscript-ng",
            "binary_version": "8.4.0-4build1"
          },
          {
            "binary_name": "python3-mapscript",
            "binary_version": "8.4.0-4build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "mapserver",
        "purl": "pkg:deb/ubuntu/mapserver@8.4.0-4build1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.4.0-1build1",
        "8.4.0-4",
        "8.4.0-4build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cgi-mapserver",
            "binary_version": "8.6.0-1build1"
          },
          {
            "binary_name": "libmapscript-java",
            "binary_version": "8.6.0-1build1"
          },
          {
            "binary_name": "libmapscript-perl",
            "binary_version": "8.6.0-1build1"
          },
          {
            "binary_name": "libmapserver2t64",
            "binary_version": "8.6.0-1build1"
          },
          {
            "binary_name": "mapserver-bin",
            "binary_version": "8.6.0-1build1"
          },
          {
            "binary_name": "php-mapscript-ng",
            "binary_version": "8.6.0-1build1"
          },
          {
            "binary_name": "python3-mapscript",
            "binary_version": "8.6.0-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "mapserver",
        "purl": "pkg:deb/ubuntu/mapserver@8.6.0-1build1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.4.0-4build1",
        "8.4.1-1",
        "8.4.1-1build1",
        "8.4.1-2",
        "8.4.1-2build1",
        "8.6.0-1",
        "8.6.0-1build1"
      ]
    }
  ],
  "aliases": [],
  "details": "MapServer is a system for developing web-based GIS applications. From 6.4.0 to before 8.6.3, msSLDParseUserStyle always calls _SLDApplyRuleValues(psRule, psLayer, 1); for any \u003cRule\u003e carrying \u003cElseFilter/\u003e \u2014 it assumes msSLDParseRule added one class. When the rule has no symbolizer (a structurally valid SLD), msSLDParseRule adds zero, and _SLDApplyRuleValues ends up indexing _class[-1], resulting in a NULL pointer dereference. A 200-byte well-formed SLD via the WMS SLD_BODY= parameter is enough to trigger this, no auth required. This vulnerability is fixed in 8.6.3.",
  "id": "UBUNTU-CVE-2026-45104",
  "modified": "2026-06-11T13:05:28Z",
  "published": "2026-05-27T20:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-45104"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-45104"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/MapServer/MapServer/security/advisories/GHSA-4h8g-378q-r75m"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-45104"
  ]
}



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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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