What is CVE-2023-42781?

CVE-2023-42781 is a medium-severity vulnerability in Apache Airflow, classified under Information Disclosure. CVSS score: 6.5/10. Published 2023-11-12.

How severe is CVE-2023-42781?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Information disclosure in Apache Airflow

CVE-2023-42781

Apache Airflow, versions before 2.7.3, has a vulnerability that allows an authorized user who has access to read specific DAGs only, to read information about task instances in other DAGs. This is a different issue than CVE-2023-42663 but leading to similar outcome. Users of Apache Airflow are advised to upgrade to version 2.7.3 or newer to mitigate the risk associated with this vulnerability.

Vulnerability class: Information Disclosure

Published 2023-11-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.017 (75.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Apache Airflow
Apache Software Foundation Airflow — versions 0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

github.com/apache/airflow/pull/34939 (Patch, patch)
lists.apache.org/thread/7dnl8nszdxqyns57f3dw0sloy5dfl9o1 (vendor-advisory, Mailing List, Third Party Advisory)
www.openwall.com/lists/oss-security/2023/11/12/2 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2023-42781?: CVE-2023-42781 is a medium-severity vulnerability in Apache Airflow, classified under Information Disclosure. CVSS score: 6.5/10. Published 2023-11-12.
How severe is CVE-2023-42781?: Medium severity. CVSS v3 base score is 6.5 out of 10.