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Vulnerabilities

Vulnerability · CVE-2026-33264

A bug in allowed unrestricted of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to

Published Jul 7, 2026 · catalog updated Nov 3, 2026 · A bug in allowed

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-33264. EPSS is 1.65%. Act only if a listed version of A bug in allowed is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A bug in allowed).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.65%
Remediation
Version ranges on file
Affected products
cpe apache/airflow · vendor Apache Software Foundation

A bug in allowed unrestricted of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the config to a narrow allowlist.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apache/airflow< 3.3.0
  • vendor Apache Software Foundationversion unspecified

How to fix CVE-2026-33264

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-33264. EPSS is 1.65%. Act only if a listed version of A bug in allowed is installed.

Which versions are affected?

Compare what you have installed with < 3.3.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-502: Deserialization of Untrusted Data. EPSS 1.65%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Apache Airflow security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 7, 2026 · Monitored products — high

    Detected

    A bug in allowed unrestricted of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to 3.3.0 or later. As a d

  2. Oct 25, 2026 · Monitored products — high

    Updated

    A bug in allowed unrestricted of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to 3.3.0 or later. As a d

  3. Nov 3, 2026 · EUVD

    Updated

    A bug in allowed unrestricted of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to 3.3.0 or later. As a d

  4. Nov 3, 2026 · NIST NVD

    Updated

    A bug in allowed unrestricted of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to 3.3.0 or later. As a d

Sources

  • EUVDVulnerability recordEUVD-2026-42030

    A bug in allowed unrestricted of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security bou

    euvd.enisa.europa.eu
  • Monitored products — highVendor advisoryCVE-2026-33264

    A bug in allowed unrestricted of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to 3.3.0 or later. As a d

    nvd.nist.gov
  • NIST NVDVulnerability recordCVE-2026-33264

    A bug in allowed unrestricted of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server /

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • NIST NVDNov 3, 2026
  • EUVDNov 3, 2026
  • Monitored products — highNov 2, 2026