What is CVE-2026-41017?

CVE-2026-41017 is a medium-severity vulnerability in Apache Airflow, classified under Sensitive Cookie in HTTPS Session Without 'Secure' Attribute. CVSS score: 5.9/10. Published 2026-06-01.

How severe is CVE-2026-41017?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Apache Airflow

CVE-2026-41017

Apache Airflow's `JWTRefreshMiddleware` set the JWT auth cookie without the `Secure` flag, so deployments running the Airflow API server behind an HTTPS-terminating reverse proxy (e.g. nginx / Envoy / a managed load balancer that terminates TLS and forwards plaintext to the API server, the default cloud-native topology) would have the user's session JWT replayed over any cleartext HTTP request to the same host. A network-positioned attacker (Wi-Fi MITM, hostile LAN, captive-portal proxy) could induce a logged-in user's browser to issue an HTTP request to the deployment's hostname and capture the JWT cookie out of that request, then replay it against the authenticated API. Affects deployments where the Airflow API server is reached through a TLS-terminating proxy and the cookie's secure-by-default protection is load-bearing for session integrity. Users are advised to upgrade to `apache-airflow` 3.2.2 or later.

Published 2026-06-01 · last modified 2026-07-21.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (30.0th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Apache Airflow
Apache Software Foundation Airflow — versions 3.0.0

Weakness classification (CWE)

CWE-614 — Sensitive Cookie in HTTPS Session Without 'Secure' Attribute

References

github.com/apache/airflow/pull/65348 (Patch, patch, Issue Tracking)
lists.apache.org/thread/9jx0sk49c1250zflx0q3clc717qgjdch (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-41017?: CVE-2026-41017 is a medium-severity vulnerability in Apache Airflow, classified under Sensitive Cookie in HTTPS Session Without 'Secure' Attribute. CVSS score: 5.9/10. Published 2026-06-01.
How severe is CVE-2026-41017?: Medium severity. CVSS v3 base score is 5.9 out of 10.