How severe is CVE-2025-66388?

CVE-2025-66388 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-66388 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66388?

CVE-2025-66388 affects Apache Airflow. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66388?

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

Does CVE-2025-66388 have an EU (EUVD) identifier?

Yes. CVE-2025-66388 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203358.

When was CVE-2025-66388 published?

CVE-2025-66388 was published on 2025-12-15 and last updated on 2026-06-17.

CVE-2025-66388

CVE-2025-66388 is a medium-severity vulnerability in Apache Airflow 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-201.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203358
Weakness: CWE-201
Affected product: Apache Airflow
Published: 2025-12-15
Last modified: 2026-06-17

Description

A vulnerability in Apache Airflow allowed authenticated UI users to view secret values in rendered templates due to secrets not being properly redacted, potentially exposing secrets to users without the appropriate authorization. Users are recommended to upgrade to version 3.1.4, which fixes this issue.

Frequently asked questions

What is CVE-2025-66388?: A vulnerability in Apache Airflow allowed authenticated UI users to view secret values in rendered templates due to secrets not being properly redacted, potentially exposing secrets to users without the appropriate authorization. Users are recommended to upgrade to version 3.1.4, which fixes this issue.
How severe is CVE-2025-66388?: CVE-2025-66388 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-66388 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66388?: CVE-2025-66388 affects Apache Airflow. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66388?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66388 have an EU (EUVD) identifier?: Yes. CVE-2025-66388 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203358.
When was CVE-2025-66388 published?: CVE-2025-66388 was published on 2025-12-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*

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