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Critical

rails — security advisory

Type: advisorySources: OSVAdvisory ID: UBUNTU-CVE-2026-33202

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's `DiskService#delete_prefixed` passes blob keys directly to `Dir.glob` without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

Products
rails
Affected versions
2:4.1.10-1, 2:4.2.10-0ubuntu4, 2:4.2.10-0ubuntu4+esm1, 2:4.2.10-0ubuntu4+esm2, 2:4.2.5-1, 2:4.2.5.1-1, 2:4.2.5.2-2, 2:4.2.6-1, 2:4.2.6-1ubuntu0.1~esm1, 2:4.2.6-1ubuntu0.1~esm2, 2:4.2.9-2, 2:4.2.9-4, 2:5.2.2.1+dfsg-1ubuntu1, 2:5.2.3+dfsg-3, 2:5.2.3+dfsg-3ubuntu0.1~esm1, 2:6.0.3.7+dfsg-2, 2:6.1.4.1+dfsg-8ubuntu2, 2:6.1.4.1+dfsg-8ubuntu2+esm1, 2:6.1.7.3+dfsg-2build1, 2:6.1.7.3+dfsg-3, 2:6.1.7.3+dfsg-7, 2:7.2.2.1+dfsg-7, 2:7.2.2.2+dfsg-2, 2:7.2.3+dfsg-2, 2:7.2.3.2+dfsg-2
Fixed versions
Not specified
CVEs
CVE-2026-33202
Confirmed fixed CVEs
Not specified
Updated in this feed
31 Oct 2026, 02:07 UTC · Revision 1

Source evidence

UBUNTU-CVE-2026-33202

core-osv · Original source

Published 24 Mar 2026, 00:16 UTC

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's `DiskService#delete_prefixed` passes blob keys directly to `Dir.glob` without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

osv:UBUNTU-CVE-2026-33202

rails

Fixed versions: Not specified

rails

Fixed versions: Not specified

rails

Fixed versions: Not specified

rails

Fixed versions: Not specified

rails

Fixed versions: Not specified

rails

Fixed versions: Not specified

rails

Fixed versions: Not specified

rails

Fixed versions: Not specified

Complete source record
{
  "id": "b59a14fe1fd2a61cbcc3283bb3082093c68698a10ff86d63bbd28208b7f06f1a",
  "url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-33202",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "UBUNTU-CVE-2026-33202",
    "summary": "Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's `DiskService#delete_prefixed` passes blob keys directly to `Dir.glob` without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.",
    "evidence": "osv:UBUNTU-CVE-2026-33202",
    "products": [
      {
        "name": {
          "value": "rails",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2:4.1.10-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2:4.2.5-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2:4.2.5.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2:4.2.5.2-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2:4.2.6-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2:4.2.6-1ubuntu0.1~esm1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "2:4.2.6-1ubuntu0.1~esm2",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "rails",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2:4.2.9-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2:4.2.9-4",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2:4.2.10-0ubuntu4",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2:4.2.10-0ubuntu4+esm1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "2:4.2.10-0ubuntu4+esm2",
            "evidence": "/affected/1/versions"
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      },
      {
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          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
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        "affected_versions": [
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            "value": "2:5.2.2.1+dfsg-1ubuntu1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2:5.2.3+dfsg-3",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "2:5.2.3+dfsg-3ubuntu0.1~esm1",
            "evidence": "/affected/2/versions"
          }
        ]
      },
      {
        "name": {
          "value": "rails",
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        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
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            "evidence": "/affected/3/versions"
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          {
            "value": "2:6.1.4.1+dfsg-8ubuntu2",
            "evidence": "/affected/3/versions"
          },
          {
            "value": "2:6.1.4.1+dfsg-8ubuntu2+esm1",
            "evidence": "/affected/3/versions"
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        ]
      },
      {
        "name": {
          "value": "rails",
          "evidence": "/affected/4/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2:6.1.7.3+dfsg-2build1",
            "evidence": "/affected/4/versions"
          },
          {
            "value": "2:6.1.7.3+dfsg-3",
            "evidence": "/affected/4/versions"
          }
        ]
      },
      {
        "name": {
          "value": "rails",
          "evidence": "/affected/5/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2:6.1.7.3+dfsg-7",
            "evidence": "/affected/5/versions"
          },
          {
            "value": "2:7.2.2.1+dfsg-7",
            "evidence": "/affected/5/versions"
          }
        ]
      },
      {
        "name": {
          "value": "rails",
          "evidence": "/affected/6/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2:7.2.3+dfsg-2",
            "evidence": "/affected/6/versions"
          },
          {
            "value": "2:7.2.3.2+dfsg-2",
            "evidence": "/affected/6/versions"
          }
        ]
      },
      {
        "name": {
          "value": "rails",
          "evidence": "/affected/7/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "2:7.2.2.1+dfsg-7",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "2:7.2.2.2+dfsg-2",
            "evidence": "/affected/7/versions"
          },
          {
            "value": "2:7.2.3+dfsg-2",
            "evidence": "/affected/7/versions"
          }
        ]
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "UBUNTU-CVE-2026-33202",
      "aliases": [
        "UBUNTU-CVE-2026-33202"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U"
        },
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H"
        },
        {
          "type": "Ubuntu",
          "score": "medium"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
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            "purl": "pkg:deb/ubuntu/rails?arch=source&distro=esm-apps%2Fxenial",
            "ecosystem": "Ubuntu:Pro:16.04:LTS"
          },
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            "2:4.2.5-1",
            "2:4.2.5.1-1",
            "2:4.2.5.2-2",
            "2:4.2.6-1",
            "2:4.2.6-1ubuntu0.1~esm1",
            "2:4.2.6-1ubuntu0.1~esm2"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33202.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
                "binary_name": "rails",
                "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
              },
              {
                "binary_name": "ruby-actionmailer",
                "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
              },
              {
                "binary_name": "ruby-actionpack",
                "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
              },
              {
                "binary_name": "ruby-actionview",
                "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
              },
              {
                "binary_name": "ruby-activejob",
                "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
              },
              {
                "binary_name": "ruby-activemodel",
                "binary_version": "2:4.2.6-1ubuntu0.1~esm2"
              },
              {
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              },
              {
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              },
              {
                "binary_name": "ruby-rails",
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              },
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        },
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            "purl": "pkg:deb/ubuntu/rails?arch=source&distro=esm-apps%2Fbionic",
            "ecosystem": "Ubuntu:Pro:18.04:LTS"
          },
          "versions": [
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            "2:4.2.9-4",
            "2:4.2.10-0ubuntu4",
            "2:4.2.10-0ubuntu4+esm1",
            "2:4.2.10-0ubuntu4+esm2"
          ],
          "database_specific": {
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          },
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          },
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              },
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                "binary_name": "ruby-rails",
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              },
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        },
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          ],
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              {
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                "binary_version": "2:6.1.7.3+dfsg-3"
              },
              {
                "binary_name": "ruby-activerecord",
                "binary_version": "2:6.1.7.3+dfsg-3"
              },
              {
                "binary_name": "ruby-activestorage",
                "binary_version": "2:6.1.7.3+dfsg-3"
              },
              {
                "binary_name": "ruby-activesupport",
                "binary_version": "2:6.1.7.3+dfsg-3"
              },
              {
                "binary_name": "ruby-rails",
                "binary_version": "2:6.1.7.3+dfsg-3"
              },
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        },
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              ]
            }
          ],
          "package": {
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            "purl": "pkg:deb/ubuntu/rails?arch=source&distro=questing",
            "ecosystem": "Ubuntu:25.10"
          },
          "versions": [
            "2:6.1.7.3+dfsg-7",
            "2:7.2.2.1+dfsg-7"
          ],
          "database_specific": {
            "source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-33202.json"
          },
          "ecosystem_specific": {
            "binaries": [
              {
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                "binary_version": "2:7.2.2.1+dfsg-7"
              },
              {
                "binary_name": "ruby-actioncable",
                "binary_version": "2:7.2.2.1+dfsg-7"
              },
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      "modified": "2026-10-17T12:58:10.188993223Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-33202"
      ],
      "references": [
        "https://ubuntu.com/security/CVE-2026-33202",
        "https://www.cve.org/CVERecord?id=CVE-2026-33202",
        "https://github.com/rails/rails/commit/8c9676b803820110548cdb7523800db43bc6874c",
        "https://github.com/rails/rails/commit/955284d26e469a9c026a4eee5b21f0414ab0bccf",
        "https://github.com/rails/rails/commit/fa19073546360856e9f4dab221fc2c5d73a45e82",
        "https://github.com/rails/rails/releases/tag/v7.2.3.1",
        "https://github.com/rails/rails/releases/tag/v8.0.4.1",
        "https://github.com/rails/rails/releases/tag/v8.1.2.1",
        "https://github.com/rails/rails/security/advisories/GHSA-73f9-jhhh-hr5m"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-33202",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/1/score"
  },
  "source_id": "core-osv",
  "document_id": 358263,
  "published_at": "2026-03-24T00:16:00+00:00"
}