CVE-2026-50203
CVE-2026-50203 is a critical-severity vulnerability in Apache Apache-airflow-providers-sftp with a CVSS 3.x base score of 9.1. 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: Critical (CVSS 3.x base score 9.1)
- EPSS exploit prediction: 1% (46th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-37520
- Weakness: CWE-22
- Affected product: Apache Apache-airflow-providers-sftp
- Published:
- Last modified:
Description
A path traversal in the SFTP provider (`SFTPHook.retrieve_directory` / `SFTPOperator(operation=get)`) let a malicious or compromised remote SFTP server write files outside the configured local destination directory via crafted directory-entry names. No Airflow account is required — the attack surface is any deployment downloading directories from an untrusted SFTP server. Upgrade `apache-airflow-providers-sftp` to 5.8.1 or later.
Frequently asked questions
- What is CVE-2026-50203?
- A path traversal in the SFTP provider (`SFTPHook.retrieve_directory` / `SFTPOperator(operation=get)`) let a malicious or compromised remote SFTP server write files outside the configured local destination directory via crafted directory-entry names. No Airflow account is required — the attack surface is any deployment downloading directories from an untrusted SFTP server. Upgrade `apache-airflow-providers-sftp` to 5.8.1 or later.
- How severe is CVE-2026-50203?
- CVE-2026-50203 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
- Is CVE-2026-50203 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-50203?
- CVE-2026-50203 affects Apache Apache-airflow-providers-sftp. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-50203?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-50203 have an EU (EUVD) identifier?
- Yes. CVE-2026-50203 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-37520.
- When was CVE-2026-50203 published?
- CVE-2026-50203 was published on 2026-06-17.
References
- https://github.com/apache/airflow/pull/67985
- https://lists.apache.org/thread/7f4b284oh44c1n95oq8mh1qc7y1lr9dx
- http://www.openwall.com/lists/oss-security/2026/06/16/3
Affected products (1)
- cpe:2.3:a:apache:apache-airflow-providers-sftp:*:*:*:*:*:*:*:*
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