All vulnerabilities
CVE-2026-68968BIT-airflow-2026-68968GHSA-j4jc-cq9h-xrhrPYSEC-2026-3710

apache-airflow: Apache Airflow Backfill API parser discrepancy permits cross-DAG authorization bypass

Apache Software Foundation apache-airflowpipLibraries & packages
Open in ThreatlineRecord JSON
CVSS
7.5High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.42%Chance of exploitation activity in the next 30 days, higher than 34% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in3.3.1Fixed versionGitHub
Published12 Aug 2026Updated 2 Oct 2026CVE List

What fixes it

  • 3.3.1apache-airflow, pipGitHub
  • 3.3.1Apache AirflowCVE List
  • 3.3.1apache-airflow, PyPIOSVpip install "apache-airflow>=3.3.1"

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Apache Airflow's Backfill API authorized a request against a Dag id supplied by the caller whenever the backfill_id path segment failed to parse. The authorization dependency parsed it with int() while the route handler parsed it as pydantic's NonNegativeInt, which accepts values int() rejects (1.0 coerces to 1); FastAPI resolves dependencies before endpoint validation, so the two acted on different Dags. An authenticated user holding edit permission on any single Dag could therefore read, pause and cancel backfills belonging to any other Dag, including moving another Dag's queued runs to failed. No non-default configuration is required and backfill ids are sequential, so finding a target is trivial. Users are advised to upgrade to apache-airflow 3.3.1 or later, which parses the backfill id with the same type the routes declare.

Text from CVE List

Affected versions 53

  • apache-airflow, pip< 3.3.1GitHub
  • Apache Airflowaffected: all versions before 3.3.1CVE List
  • apache-airflow, PyPIfrom first release, fixed in 3.3.1OSV
  • apache-airflow, PyPI1.10.0OSV
  • apache-airflow, PyPI1.10.1OSV
  • apache-airflow, PyPI1.10.10OSV
  • apache-airflow, PyPI1.10.10rc1OSV
  • apache-airflow, PyPI1.10.10rc2OSV
  • apache-airflow, PyPI1.10.10rc3OSV
  • apache-airflow, PyPI1.10.10rc4OSV
  • apache-airflow, PyPI1.10.10rc5OSV
  • apache-airflow, PyPI1.10.11OSV
  • apache-airflow, PyPI1.10.11rc1OSV
  • apache-airflow, PyPI1.10.11rc2OSV
  • apache-airflow, PyPI1.10.12OSV
  • apache-airflow, PyPI1.10.12rc1OSV
  • apache-airflow, PyPI1.10.12rc2OSV
  • apache-airflow, PyPI1.10.12rc3OSV
  • apache-airflow, PyPI1.10.12rc4OSV
  • apache-airflow, PyPI1.10.13OSV
  • apache-airflow, PyPI1.10.13rc1OSV
  • apache-airflow, PyPI1.10.14OSV
  • apache-airflow, PyPI1.10.14rc1OSV
  • apache-airflow, PyPI1.10.14rc2OSV
  • apache-airflow, PyPI1.10.14rc3OSV
  • apache-airflow, PyPI1.10.14rc4OSV
  • apache-airflow, PyPI1.10.15OSV
  • apache-airflow, PyPI1.10.15rc1OSV
  • apache-airflow, PyPI1.10.1b1OSV
  • apache-airflow, PyPI1.10.1rc2OSV
  • apache-airflow, PyPI1.10.2OSV
  • apache-airflow, PyPI1.10.2b2OSV
  • apache-airflow, PyPI1.10.2rc1OSV
  • apache-airflow, PyPI1.10.2rc2OSV
  • apache-airflow, PyPI1.10.2rc3OSV
  • apache-airflow, PyPI1.10.3OSV
  • apache-airflow, PyPI1.10.3b1OSV
  • apache-airflow, PyPI1.10.3b2OSV
  • apache-airflow, PyPI1.10.3rc1OSV
  • apache-airflow, PyPI1.10.3rc2OSV
  • apache-airflow, PyPI1.10.4OSV
  • apache-airflow, PyPI1.10.4b2OSV
  • apache-airflow, PyPI1.10.4rc1OSV
  • apache-airflow, PyPI1.10.4rc2OSV
  • apache-airflow, PyPI1.10.4rc3OSV
  • apache-airflow, PyPI1.10.4rc4OSV
  • apache-airflow, PyPI1.10.4rc5OSV
  • apache-airflow, PyPI1.10.5OSV
  • apache-airflow, PyPI1.10.5rc1OSV
  • apache-airflow, PyPI1.10.6OSV
  • apache-airflow, PyPI1.10.6rc1OSV
  • apache-airflow, PyPI1.10.6rc2OSV
  • apache-airflow, PyPI1.10.7OSV

References 8