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assimp — security advisory

Type: advisorySources: OSVAdvisory ID: UBUNTU-CVE-2026-10231

A security flaw has been discovered in Assimp up to 6.0.4. Affected is the function HL1MDLLoader::extract_anim_value of the file HL1MDLLoader.cpp of the component Half-Life 1 MDL Loader. Performing a manipulation of the argument num.total results in heap-based buffer overflow. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. The project tagged the reported issue as bug.

Products
assimp
Affected versions
3.0~dfsg-4ubuntu4, 3.1.1~dfsg-5, 3.2~dfsg-1, 3.2~dfsg-2, 3.2~dfsg-3, 3.3.1~dfsg-5, 3.3.1~dfsg-5+build1, 3.3.1~dfsg-5ubuntu1, 4.0.1~dfsg-1, 4.0.1~dfsg-1~exp2, 4.1.0~dfsg-1, 4.1.0~dfsg-2, 4.1.0~dfsg-3, 4.1.0~dfsg-5, 4.1.0~dfsg-5ubuntu1, 5.0.1~ds0-1build1, 5.0.1~ds0-2, 5.0.1~ds0-3ubuntu1, 5.1.4~ds0-1, 5.1.5~ds0-1, 5.1.6~ds0-1, 5.2.0~ds0-2, 5.2.1~ds0-1, 5.2.2~ds0-1, 5.2.5~ds0-1.1build1, 5.3.1+ds-1, 5.3.1+ds-2, 5.3.1+ds-2build1, 5.4.3+ds-2, 6.0.2+ds-1, 6.0.3+ds-1, 6.0.4+ds-1, 6.0.4+ds-1build1, 6.0.5+ds-1
Fixed versions
Not specified
CVEs
CVE-2026-10231
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 02:53 UTC · Revision 1

Source evidence

UBUNTU-CVE-2026-10231

core-osv · Original source

Published 1 Jun 2026, 08:16 UTC

A security flaw has been discovered in Assimp up to 6.0.4. Affected is the function HL1MDLLoader::extract_anim_value of the file HL1MDLLoader.cpp of the component Half-Life 1 MDL Loader. Performing a manipulation of the argument num.total results in heap-based buffer overflow. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. The project tagged the reported issue as bug.

osv:UBUNTU-CVE-2026-10231

assimp

Fixed versions: Not specified

assimp

Fixed versions: Not specified

assimp

Fixed versions: Not specified

assimp

Fixed versions: Not specified

assimp

Fixed versions: Not specified

assimp

Fixed versions: Not specified

assimp

Fixed versions: Not specified

assimp

Fixed versions: Not specified

Complete source record
{
  "id": "ffe36ca4b98420cf80bf359faf502df3e3700898a6ef95fe86ee30ee4de076c3",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-10231",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-10231",
    "summary": "A security flaw has been discovered in Assimp up to 6.0.4. Affected is the function HL1MDLLoader::extract_anim_value of the file HL1MDLLoader.cpp of the component Half-Life 1 MDL Loader. Performing a manipulation of the argument num.total results in heap-based buffer overflow. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. The project tagged the reported issue as bug.",
    "evidence": "osv:UBUNTU-CVE-2026-10231",
    "products": [
      {
        "name": {
          "value": "assimp",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.0~dfsg-4ubuntu4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.1.1~dfsg-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.2~dfsg-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.2~dfsg-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.2~dfsg-3",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
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          "evidence": "/affected/1/package/name"
        },
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        "affected_versions": [
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            "value": "3.3.1~dfsg-5",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.3.1~dfsg-5ubuntu1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.3.1~dfsg-5+build1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.1~dfsg-1~exp2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.0.1~dfsg-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "4.1.0~dfsg-1",
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          {
            "value": "4.1.0~dfsg-2",
            "evidence": "/affected/1/versions"
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        },
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          {
            "value": "4.1.0~dfsg-5ubuntu1",
            "evidence": "/affected/2/versions"
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          {
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      {
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            "value": "5.0.1~ds0-2",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "5.0.1~ds0-3ubuntu1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "5.1.4~ds0-1",
            "evidence": "/affected/3/versions"
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          {
            "value": "5.1.5~ds0-1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "5.1.6~ds0-1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "5.2.0~ds0-2",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "5.2.1~ds0-1",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "5.2.2~ds0-1",
            "evidence": "/affected/3/versions"
          }
        ]
      },
      {
        "name": {
          "value": "assimp",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "5.2.5~ds0-1.1build1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "5.3.1+ds-1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "5.3.1+ds-2",
            "evidence": "/affected/4/versions"
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            "value": "5.3.1+ds-2build1",
            "evidence": "/affected/4/versions"
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        ]
      },
      {
        "name": {
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          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
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          {
            "value": "5.4.3+ds-2",
            "evidence": "/affected/5/versions"
          }
        ]
      },
      {
        "name": {
          "value": "assimp",
          "evidence": "/affected/6/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "6.0.4+ds-1build1",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "6.0.5+ds-1",
            "evidence": "/affected/6/versions"
          }
        ]
      },
      {
        "name": {
          "value": "assimp",
          "evidence": "/affected/7/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "5.4.3+ds-2",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "6.0.2+ds-1",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "6.0.3+ds-1",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "6.0.4+ds-1",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "6.0.4+ds-1build1",
            "evidence": "/affected/7/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2026-10231",
      "aliases": [
        "UBUNTU-CVE-2026-10231"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
        },
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "assimp",
            "purl": "pkg:deb/ubuntu/assimp?arch=source&distro=xenial",
            "ecosystem": "Ubuntu:16.04:LTS"
          },
          "versions": [
            "3.0~dfsg-4ubuntu4",
            "3.1.1~dfsg-5",
            "3.2~dfsg-1",
            "3.2~dfsg-2",
            "3.2~dfsg-3"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10231.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "assimp-utils",
                "binary_version": "3.2~dfsg-3"
              },
              {
                "binary_name": "libassimp3v5",
                "binary_version": "3.2~dfsg-3"
              },
              {
                "binary_name": "python-pyassimp",
                "binary_version": "3.2~dfsg-3"
              }
            ]
          }
        },
        {
          "ranges": [
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              "type": "ECOSYSTEM",
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          ],
          "package": {
            "name": "assimp",
            "purl": "pkg:deb/ubuntu/assimp?arch=source&distro=bionic",
            "ecosystem": "Ubuntu:18.04:LTS"
          },
          "versions": [
            "3.3.1~dfsg-5",
            "3.3.1~dfsg-5ubuntu1",
            "3.3.1~dfsg-5+build1",
            "4.0.1~dfsg-1~exp2",
            "4.0.1~dfsg-1",
            "4.1.0~dfsg-1",
            "4.1.0~dfsg-2",
            "4.1.0~dfsg-3"
          ],
          "database_specific": {
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          },
          "ecosystem_specific": {
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              {
                "binary_name": "assimp-utils",
                "binary_version": "4.1.0~dfsg-3"
              },
              {
                "binary_name": "libassimp4",
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              },
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            "5.0.1~ds0-1build1"
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          },
          "ecosystem_specific": {
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            "5.1.5~ds0-1",
            "5.1.6~ds0-1",
            "5.2.0~ds0-2",
            "5.2.1~ds0-1",
            "5.2.2~ds0-1"
          ],
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          },
          "ecosystem_specific": {
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          },
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          ],
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          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "assimp-testmodels",
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              {
                "binary_name": "assimp-utils",
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              },
              {
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          ],
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          ],
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            "purl": "pkg:deb/ubuntu/assimp?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "6.0.4+ds-1build1",
            "6.0.5+ds-1"
          ],
          "database_specific": {
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          },
          "ecosystem_specific": {
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              {
                "binary_name": "assimp-testmodels",
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                {
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          ],
          "package": {
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            "purl": "pkg:deb/ubuntu/assimp?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "5.4.3+ds-2",
            "6.0.2+ds-1",
            "6.0.3+ds-1",
            "6.0.4+ds-1",
            "6.0.4+ds-1build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10231.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "assimp-testmodels",
                "binary_version": "6.0.4+ds-1build1"
              },
              {
                "binary_name": "assimp-utils",
                "binary_version": "6.0.4+ds-1build1"
              },
              {
                "binary_name": "libassimp6",
                "binary_version": "6.0.4+ds-1build1"
              },
              {
                "binary_name": "python3-pyassimp",
                "binary_version": "6.0.4+ds-1build1"
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            ]
          }
        }
      ],
      "modified": "2026-10-17T12:59:46.145454906Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-10231"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-10231",
        "https://www.cve.org/CVERecord?id=CVE-2026-10231",
        "https://github.com/assimp/assimp/issues/6616",
        "https://github.com/assimp/assimp/",
        "https://github.com/user-attachments/files/27195744/poc.zip",
        "https://vuldb.com/cve/CVE-2026-10231",
        "https://vuldb.com/submit/821191",
        "https://vuldb.com/vuln/367510",
        "https://vuldb.com/vuln/367510/cti"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-10231",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 359756,
  "published_at": "2026-06-01T08:16:00+00:00"
}