Medium [CVE-2026-111395] Apache Airflow did not reject reserved serialization keys inside a Dag run's `conf`
This medium-severity Apache Software Foundation advisory covers CVE-2026-111395; related products: Apache Airflow.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
Apache Airflow did not reject reserved serialization keys inside a Dag run's `conf`. A user allowed to trigger a Dag that uses a deadline alert with an asynchronous callback could pass a `conf` that, once the deadline was missed, either crashed the scheduler repeatedly or was rebuilt into objects inside the Triggerer.
Users are advised to upgrade to apache-airflow 3.4.0 or later.
Is CVE-2026-111395 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-111395 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-111395?
Upgrade to a fixed release named by Apache:
- 3.4.0
Confirm against the vendor advisory before you patch.
- Apache Airflow 3.2.0 before 3.4.0
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Mitigation checklist
- Users are advised to upgrade to apache-airflow 3.4.0 or later.
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
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