RCE in widely used Apache Airflow allows attacker-supplied DAGs to execute code in Scheduler/API, risking pipeline compromise across many enterprises.
CVE-2026-33264
Airflow deserialization RCE: malicious DAGs allow remote code execution in Scheduler/API.
Is CVE-2026-33264 being exploited?
Not confirmed. CVE-2026-33264 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 1.0% probability of exploitation in the next 30 days.
How severe is CVE-2026-33264?
CVE-2026-33264 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-33264?
Yes. A fix has been recorded for CVE-2026-33264. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-33264 affect?
CVE-2026-33264 affects Apache Airflow < 3.3.0, Scheduler process, API Server process, Serialized DAG loading. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33264?
Upgrade to apache-airflow 3.3.0+ and restrict [core] allowed_deserialization_classes allowlist.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution in Airflow Scheduler/API via attacker-controlled DAG deserialization; can run arbitrary code with process privileges, access data, disrupt pipelines, pivot.
Immediate action required
- affected< 3.3.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.