What is CVE-2026-28779?

CVE-2026-28779 is a high-severity vulnerability in Apache Airflow, classified under Exposure of Resource to Wrong Sphere. CVSS score: 7.5/10. Published 2026-03-17.

How severe is CVE-2026-28779?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Apache Airflow

CVE-2026-28779

Apache Airflow versions 3.1.0 through 3.1.7 session token (_token) in cookies is set to path=/ regardless of the configured [webserver] base_url or [api] base_url. This allows any application co-hosted under the same domain to capture valid Airflow session tokens from HTTP request headers, allowing full session takeover without attacking Airflow itself. Users are recommended to upgrade to Apache Airflow 3.1.8 or later, which resolves this issue.

Published 2026-03-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (53.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.001

Affected products

Apache Airflow
Apache Software Foundation Airflow — versions 3.0.0

Weakness classification (CWE)

CWE-668 — Exposure of Resource to Wrong Sphere

References

github.com/apache/airflow/pull/62771 (Patch, patch, Issue Tracking)
lists.apache.org/thread/r4n5znb8mcq14wo9v8ndml36nxlksdqb (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-28779?: CVE-2026-28779 is a high-severity vulnerability in Apache Airflow, classified under Exposure of Resource to Wrong Sphere. CVSS score: 7.5/10. Published 2026-03-17.
How severe is CVE-2026-28779?: High severity. CVSS v3 base score is 7.5 out of 10.