CVE-2026-49818 json
Apache Airflow Samba provider: Path traversal in GCSToSambaOperator via GCS object names
published 2026-06-09 5 mo ago modified 2026-08-04 3 mo ago also GHSA-f6vj-48fm-hmvx , PYSEC-2026-208 , EUVD-2026-35374
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 50%
- public exploits
- 0
- none known
Summary
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`.
Patch / fix
- pypi apache-airflow-providers-samba 4.12.6
- Apache Software Foundation Apache Airflow Samba provider 4.12.6
- github.com/apache/airflow@bc1df02 commit
- github.com/apache/airflow#67857 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | apache-airflow-providers-samba | <4.12.6 |
4.12.6 |
Affected products
- Apache Software Foundation Apache Airflow Samba provider
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/apache/airflow/pull/67857
patch, web, issue-tracking
-
github.com
/apache/airflow/commit/bc1df029af15cb1d35d5ca0d33bf9235500137cc
web
-
lists.apache.org
/thread/3vs0m3p51psgf54tts18d6336g24x3sf
vendor-advisory, web, mailing-list, advisory
-
openwall.com
/lists/oss-security/2026/06/09/8
web, mailing-list, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-49818
advisory
-
github.com
/apache/airflow
package
-
github.com
/pypa/advisory-database/tree/main/vulns/apache-airflow-providers-samba/PYSEC-2026-208.yaml
web
-
github.com
/advisories/GHSA-f6vj-48fm-hmvx
advisory
Sources
- CVE List CVE-2026-49818
- GitHub Advisory GHSA-f6vj-48fm-hmvx
- NVD CVE-2026-49818
- OSV PYSEC-2026-208
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