CVE-2026-50203

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.

CVSS v3.1 Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS — Exploit Prediction

0.0063

Probability of exploitation

0.46%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-22 Path Traversal

Affected Products

Vendor	Product	Versions
apache	apache-airflow-providers-sftp	< 5.8.1

References

Advisories & Patches

https://github.com/apache/airflow/pull/67985 https://lists.apache.org/thread/7f4b284oh44c1n95oq8mh1qc7y1lr9dx

Other References

http://www.openwall.com/lists/oss-security/2026/06/16/3

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. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2026-50203? +

CVE-2026-50203 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0063, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-50203? +

CVE-2026-50203 affects products from apache, specifically: apache-airflow-providers-sftp. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-50203? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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