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No exploitation reportedAwaiting NVD analysis

CVE-2026-82337

Apache Airflow: DeadlineAlert fields bypass plugin-registration gate for scheduler-side deserialization

No exploitation reported by the sources we read.

  • Published2026-11-09
  • WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2026-11-0909:51CVE publishedCNA

Versions per branch

Products declared by the CNA

As apache, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Apache Software Foundation Apache Airflowother versions: not affected

    package apache-airflow-corehttps://pypi.python.org

    Affected
    • < 3.4.0fixed in 3.4.0semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-09

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-82337 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Published
2026-11-09
Last Modified
2026-11-12
NVD status
Awaiting Analysis
GitHub Advisory
GHSA-5g3c-4f7x-qxvx

Frequently asked questions

What is 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. 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 actively exploited?

Active exploitation of CVE-2026-82337 has not been confirmed. Its EPSS score was 0.4% on 2026-11-11, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-82337?

CVE-2026-82337 has a CVSS v3 base score of 7.3 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

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