Medium [CVE-2026-82337] Apache Airflow rebuilt deadline alert fields through generic deserialization, which imports and instantiates the class named in the serialized Dag, in the scheduler and API server
This medium-severity Apache Software Foundation advisory covers CVE-2026-82337; related products: Apache Airflow.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
Apache Airflow rebuilt deadline alert fields through generic deserialization, which imports and instantiates the class named in the serialized Dag, in the scheduler and API server. A Dag author could cause classes within Airflow's deserialization allow list to be constructed in those processes with arguments they control.
Deployments whose Dags use deadline alerts are affected.
This is an incomplete fix of CVE-2026-45360, which only hardened the `reference` field; deployments that applied that fix remain affected through the `callback` and `interval` fields.
Users of apache-airflow are recommended to upgrade to 3.4.0 or later.
Is CVE-2026-82337 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-82337 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-2026-82337?
Upgrade to a fixed release named by Apache:
- 3.4.0
Confirm against the vendor advisory before you patch.
- Apache Airflow before 3.4.0
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Mitigation checklist
- Users of apache-airflow are recommended to upgrade to 3.4.0 or later.
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Get an email when Apache Airflow publishes the next one.
See Apache Airflow's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).
More Apache Software Foundation advisories
- CVE-2026-40913Nov 9, 2026Apache Airflow's public Import Errors API returns the raw parse-failure stack trace to any
- CVE-2026-50204Nov 9, 2026Apache Airflow's audit log stored Connection and Variable secret values in cleartext
- CVE-2026-68982Nov 9, 2026Apache Airflow's CeleryExecutor ran callback workloads
- CVE-2026-76185Nov 9, 2026Apache Airflow's Task SDK secret cache built its keys from the team name and secret id
- CVE-2026-86829Nov 9, 2026Apache Airflow's scheduler fully deserializes XCom values written by task code
- CVE-2026-86468Nov 9, 2026Apache Airflow's CLI records its arguments in the audit log but masks secrets by argument
iPhone and Android apps · New on the App Store
Monitor future Apache Software Foundation CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.