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CVE-2026-82337VulnerabilityPublished

Apache Airflow rebuilt deadline alert fields through generic deserialization, which imports and instantiates the class

Source GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-82337· High

Not known to be exploited : upgrade to 3.4.0 soon.

Data as of 9 Nov 2026, 13:21 UTC

Severity
High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 3.4.0

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

What to do

Upgrade Apache Airflow and apache-airflow-core to 3.4.0.

Affected software

ProductAffectedFixed in
Apache Airflowapache-airflow-coreAffected
  • <3.4.0
Fixed in
  • 3.4.0
PyPIapache-airflow-corepkg:pypi/apache-airflow-coreOther threatsAffected
  • <3.4.0
Fixed in
  • 3.4.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade Apache Airflow to version 3.4.0 or later, where this vulnerability is fixed. The partial fix for CVE-2026-45360 is insufficient as it only addressed the 'reference' field, leaving other fields vulnerable. No other mitigations are documented.

Description

Apache Airflow versions prior to 3.4.0 are vulnerable to unsafe deserialization in deadline alert fields. This vulnerability allows a DAG author to instantiate classes from Airflow's deserialization allow list with controlled arguments in the scheduler and API server processes. The issue persists despite a partial fix for CVE-2026-45360, which only addressed the 'reference' field, leaving 'callback' and 'interval' fields exploitable. Users are advised to upgrade to version 3.4.0 or later to mitigate this risk.

References

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