# CVE-2026-28779: Apache Airflow: Path of session token in cookie does not consider base_url - session hijacking via co-hosted applications

Status: published. Published: 2026-03-17. Updated: 2026-11-03.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: apache) — https://github.com/apache/airflow/pull/62771

## Affected products and versions

- Apache Software Foundation / Apache Airflow (apache-airflow-core): ≥ 3.0.0; < 3.1.8 (affected, semver). Source: CNA: apache

## Severity and prioritization

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N; source: ADP: CISA-ADP

- CISA KEV: No listing in collected sources

- EPSS: 0.70% as of 2026-11-02; percentile 53.30%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-668

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/apache/airflow/pull/62771 (CNA: apache; patch)

- https://lists.apache.org/thread/r4n5znb8mcq14wo9v8ndml36nxlksdqb (CNA: apache; vendor-advisory)

- http://www.openwall.com/lists/oss-security/2026/03/17/3 (ADP: CVE)

## Provenance

- CNA: apache: https://www.cve.org/CVERecord?id=CVE-2026-28779; retrieved 2026-11-03; source updated 2026-11-03

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-28779; retrieved 2026-11-03; source updated Not reported

Revision: 2d83e1da1e6a49dd78ec6e9a6dbbd72e60df4eb3bb4419930333ee3d9600ff40

Canonical: https://y2.dev/cve/CVE-2026-28779

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