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squirrel3 — security advisory

Type: advisorySources: OSVAdvisory ID: UBUNTU-CVE-2026-8261

A vulnerability was determined in Squirrel up to 3.2. This affects the function SQFunctionProto::Load of the file squirrel/sqobject.cpp. This manipulation causes heap-based buffer overflow. The attack is restricted to local execution. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

Products
squirrel3
Affected versions
3.1-4, 3.1-5, 3.1-8, 3.1-8.2, 3.1-8.3, 3.1-8.4, 3.1-8.5, 3.1-8build1
Fixed versions
Not specified
CVEs
CVE-2026-8261
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 03:21 UTC · Revision 1

Source evidence

UBUNTU-CVE-2026-8261

core-osv · Original source

Published 11 May 2026, 02:16 UTC

A vulnerability was determined in Squirrel up to 3.2. This affects the function SQFunctionProto::Load of the file squirrel/sqobject.cpp. This manipulation causes heap-based buffer overflow. The attack is restricted to local execution. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

osv:UBUNTU-CVE-2026-8261

squirrel3

Fixed versions: Not specified

squirrel3

Fixed versions: Not specified

squirrel3

Fixed versions: Not specified

squirrel3

Fixed versions: Not specified

squirrel3

Fixed versions: Not specified

squirrel3

Fixed versions: Not specified

Complete source record
{
  "id": "9af5701c9798fcddb131b91283d288e48c50a9b43a8316be082cc25e6e03b1b1",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-8261",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-8261",
    "summary": "A vulnerability was determined in Squirrel up to 3.2. This affects the function SQFunctionProto::Load of the file squirrel/sqobject.cpp. This manipulation causes heap-based buffer overflow. The attack is restricted to local execution. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.",
    "evidence": "osv:UBUNTU-CVE-2026-8261",
    "products": [
      {
        "name": {
          "value": "squirrel3",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.1-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "3.1-5",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "squirrel3",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.1-8",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "3.1-8build1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "squirrel3",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.1-8build1",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "squirrel3",
          "evidence": "/affected/3/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.1-8.2",
            "evidence": "/affected/3/versions"
          }
        ]
      },
      {
        "name": {
          "value": "squirrel3",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.1-8.3",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "3.1-8.4",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "3.1-8.5",
            "evidence": "/affected/4/versions"
          }
        ]
      },
      {
        "name": {
          "value": "squirrel3",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "3.1-8.2",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "3.1-8.3",
            "evidence": "/affected/5/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "UBUNTU-CVE-2026-8261",
      "aliases": [
        "UBUNTU-CVE-2026-8261"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"
        },
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/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": "squirrel3",
            "purl": "pkg:deb/ubuntu/squirrel3?arch=source&distro=bionic",
            "ecosystem": "Ubuntu:18.04:LTS"
          },
          "versions": [
            "3.1-4",
            "3.1-5"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8261.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libsquirrel3-0",
                "binary_version": "3.1-5"
              },
              {
                "binary_name": "squirrel3",
                "binary_version": "3.1-5"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "squirrel3",
            "purl": "pkg:deb/ubuntu/squirrel3?arch=source&distro=focal",
            "ecosystem": "Ubuntu:20.04:LTS"
          },
          "versions": [
            "3.1-8",
            "3.1-8build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8261.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libsquirrel3-0",
                "binary_version": "3.1-8build1"
              },
              {
                "binary_name": "squirrel3",
                "binary_version": "3.1-8build1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "squirrel3",
            "purl": "pkg:deb/ubuntu/squirrel3?arch=source&distro=jammy",
            "ecosystem": "Ubuntu:22.04:LTS"
          },
          "versions": [
            "3.1-8build1"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8261.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libsquirrel3-0",
                "binary_version": "3.1-8build1"
              },
              {
                "binary_name": "squirrel3",
                "binary_version": "3.1-8build1"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "squirrel3",
            "purl": "pkg:deb/ubuntu/squirrel3?arch=source&distro=questing",
            "ecosystem": "Ubuntu:25.10"
          },
          "versions": [
            "3.1-8.2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8261.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libsquirrel3-0",
                "binary_version": "3.1-8.2"
              },
              {
                "binary_name": "squirrel3",
                "binary_version": "3.1-8.2"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "squirrel3",
            "purl": "pkg:deb/ubuntu/squirrel3?arch=source&distro=stonking",
            "ecosystem": "Ubuntu:26.10"
          },
          "versions": [
            "3.1-8.3",
            "3.1-8.4",
            "3.1-8.5"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8261.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libsquirrel3-0",
                "binary_version": "3.1-8.5"
              },
              {
                "binary_name": "squirrel3",
                "binary_version": "3.1-8.5"
              }
            ]
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "squirrel3",
            "purl": "pkg:deb/ubuntu/squirrel3?arch=source&distro=resolute",
            "ecosystem": "Ubuntu:26.04:LTS"
          },
          "versions": [
            "3.1-8.2",
            "3.1-8.3"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-8261.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "libsquirrel3-0",
                "binary_version": "3.1-8.3"
              },
              {
                "binary_name": "squirrel3",
                "binary_version": "3.1-8.3"
              }
            ]
          }
        }
      ],
      "modified": "2026-10-17T13:01:11.649253471Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-8261"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-8261",
        "https://www.cve.org/CVERecord?id=CVE-2026-8261",
        "https://github.com/albertodemichelis/squirrel/issues/326"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-8261",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 361196,
  "published_at": "2026-05-11T02:16:00+00:00"
}