How severe is CVE-2026-49818?

CVE-2026-49818 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-49818 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-49818?

CVE-2026-49818 affects Apache Apache-airflow-providers-samba. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-49818?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-49818 have an EU (EUVD) identifier?

Yes. CVE-2026-49818 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35374.

When was CVE-2026-49818 published?

CVE-2026-49818 was published on 2026-06-09 and last updated on 2026-07-23.

CVE-2026-49818

CVE-2026-49818 is a medium-severity vulnerability in Apache Apache-airflow-providers-samba with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35374
Weakness: CWE-22
Affected product: Apache Apache-airflow-providers-samba
Published: 2026-06-09
Last modified: 2026-07-23

Description

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`.

Frequently asked questions

What is CVE-2026-49818?: 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`.
How severe is CVE-2026-49818?: CVE-2026-49818 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-49818 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-49818?: CVE-2026-49818 affects Apache Apache-airflow-providers-samba. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-49818?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-49818 have an EU (EUVD) identifier?: Yes. CVE-2026-49818 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35374.
When was CVE-2026-49818 published?: CVE-2026-49818 was published on 2026-06-09 and last updated on 2026-07-23.

References

Affected products (1)

cpe:2.3:a:apache:apache-airflow-providers-samba:*:*:*:*:*:*:*:*

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