PYSEC-2026-208

Vulnerability from pysec - Published: 2026-06-09 09:16 - Updated: 2026-06-13 09:37
VLAI
Details

The Apache Airflow Samba provider's GCSToSambaOperator joined GCS object names to the SMB destination path without a containment check, so an object named with ../ segments resolved a write path outside the configured destination_path. An attacker able to write objects into the source GCS bucket — typically an external data producer distinct from the trusted DAG author — could write files to arbitrary locations on the Samba target when the operator ran. Upgrade apache-airflow-providers-samba to 4.12.6 or later, which validates the resolved destination stays within destination_path.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Impacted products
Name purl
apache-airflow-providers-samba pkg:pypi/apache-airflow-providers-samba
Aliases
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "PyPI",
        "name": "apache-airflow-providers-samba",
        "purl": "pkg:pypi/apache-airflow-providers-samba"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.12.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0",
        "1.0.0b1",
        "1.0.0b2",
        "1.0.0rc1",
        "1.0.1",
        "1.0.1rc1",
        "2.0.0",
        "2.0.0rc1",
        "2.0.0rc2",
        "3.0.0",
        "3.0.0rc1",
        "3.0.1",
        "3.0.1rc1",
        "3.0.2",
        "3.0.2rc1",
        "3.0.3",
        "3.0.3rc1",
        "3.0.4",
        "3.0.4rc1",
        "4.0.0",
        "4.0.0rc1",
        "4.0.0rc2",
        "4.1.0",
        "4.1.0rc1",
        "4.10.0",
        "4.10.0rc1",
        "4.10.1",
        "4.10.1rc1",
        "4.10.2",
        "4.10.2rc1",
        "4.10.3",
        "4.10.3rc1",
        "4.11.0",
        "4.11.0rc1",
        "4.11.1",
        "4.11.1rc1",
        "4.12.0",
        "4.12.0rc1",
        "4.12.1",
        "4.12.1rc1",
        "4.12.2",
        "4.12.2rc1",
        "4.12.3",
        "4.12.3rc1",
        "4.12.4",
        "4.12.4rc1",
        "4.12.5",
        "4.12.5rc1",
        "4.12.6rc1",
        "4.2.0",
        "4.2.0rc1",
        "4.2.0rc2",
        "4.2.1",
        "4.2.1rc1",
        "4.2.2",
        "4.2.2rc1",
        "4.3.0",
        "4.3.0rc1",
        "4.4.0",
        "4.4.0rc1",
        "4.5.0",
        "4.5.0rc1",
        "4.6.0",
        "4.6.0rc1",
        "4.6.0rc2",
        "4.7.0",
        "4.7.0rc1",
        "4.7.1",
        "4.7.1rc1",
        "4.8.0",
        "4.8.0rc1",
        "4.9.0",
        "4.9.0rc1",
        "4.9.0rc2",
        "4.9.1",
        "4.9.1rc1",
        "4.9.2",
        "4.9.2rc1"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-49818"
  ],
  "details": "The Apache Airflow Samba provider\u0027s `GCSToSambaOperator` joined GCS object names to the SMB destination path without a containment check, so an object named with `../` segments resolved a write path outside the configured `destination_path`. An attacker able to write objects into the source GCS bucket \u2014 typically an external data producer distinct from the trusted DAG author \u2014 could write files to arbitrary locations on the Samba target when the operator ran. Upgrade apache-airflow-providers-samba to 4.12.6 or later, which validates the resolved destination stays within `destination_path`.",
  "id": "PYSEC-2026-208",
  "modified": "2026-06-13T09:37:37.959463Z",
  "published": "2026-06-09T09:16:30.443Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://www.openwall.com/lists/oss-security/2026/06/09/8"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread/3vs0m3p51psgf54tts18d6336g24x3sf"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apache/airflow/pull/67857"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.