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TI-2026-41827 Aliases CVE-2026-58076GHSA-8prw-8m6x-8w6f

Deserialization of untrusted data in Apache Airflow

Priority MEDIUM 41CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-502.

Summary

Apache Airflow's serialization layer reconstructed exception nodes by calling `import_string()` on a class name taken from the serialized blob and instantiating it with arguments from the same blob, with no restriction on what could be imported. An operator's `executor_config` reaches that branch, so a Dag author could place a value there that causes an arbitrary callable to be imported and invoked -- for example `subprocess.check_output`, or `builtins.eval` on the `builtins`-prefixed variant. The code runs in the **Scheduler**, which reconstructs serialized Dags in its normal loop with no request involved, and in the **API server**, on any authenticated read of the Dag such as `GET /api/v2/dags/{dag_id}/details`. Both are components the Airflow security model states must never execute Dag-author code, and both hold the metadata database credentials and the JWT signing secret. No non-default configuration is required. This is a **different sink from CVE-2026-33264**, which covered only the trigger branch of the same deserializer: deployments that upgraded in response to that advisory are still affected through the exception branch and must upgrade again. Users are advised to upgrade to apache-airflow 3.3.1 or later, which restricts the imported class to a subclass of `BaseException`.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00484 41st percentileScored 2026-11-07
Fix Fixed Apache Airflow (Apache Software Foundation): 3.3.1apache-airflow (PyPI): 3.3.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Airflow3.0.0 to before 3.3.13.3.1Patch availableCNA
—apache-airflow (PyPI)3.3.0 to before 3.3.13.3.1Patch availableGHSA-8prw-8m6x-8w6f
  • Apache Airflow VendorApache Affected 3.0.0 to before 3.3.1 Fixed in 3.3.1 Patch available CNA
  • apache-airflow (PyPI) Vendor— Affected 3.3.0 to before 3.3.1 Fixed in 3.3.1 Patch available GHSA-8prw-8m6x-8w6f

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*3.3.0 to before 3.3.1VulnerableApache
  • cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:* Versions 3.3.0 to before 3.3.1 Vulnerable ·Apache

Remediation

  • Fix · CNA Apache Airflow (Apache Software Foundation) Fixed in 3.3.1
  • Fix · GHSA-8prw-8m6x-8w6f apache-airflow (PyPI) Fixed in 3.3.1 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache Airflow 3.3.1

    12 records Highest priority Priority MEDIUM 2 MEDIUM, 10 LOW

    Other records, highest priority first

    • TI-2026-47748 Apache Airflow: DAG-author remote code execution on the Scheduler via a Serde `Callback` deserialization gadgetPriority MEDIUM 41
    • TI-2026-47565 Apache Airflow: DAG-author remote code execution on the Scheduler via awaiting_input next_kwargs deserializationPriority LOW 39
    • TI-2026-48479 Apache Airflow: Authorization bypass in the Backfill API through conflicting interpretations of the backfill idPriority LOW 33
    Show all 12 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-58076
  2. 2026-10-03 Alias added: GHSA-8prw-8m6x-8w6f
  3. 2026-10-07 EPSS moved to the below the 50th percentile
  4. 2026-11-03 Fix available: [email protected] · CNA

References

Patch 1

Advisory 2

Other 6

  • TI-2020-10905 Missing authentication in Apache Airflow KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-09638 OS command injection in Apache Airflow KEVCVSS 3.1HIGH 8.8
  • TI-2022-19017 Apache Airflow <2.4.0 has an RCE in a bash example CVSS 3.1HIGH 8.8
  • TI-2021-16140 Apache Airflow: Variable Import endpoint missed authentication check CVSS 3.1CRITICAL 9.8
  • TI-2022-08169 Apache Airflow: RCE in example DAGs CVSS 3.1HIGH 8.8
  • TI-2024-26776 Apache Airflow: DAG Author Code Execution possibility in airflow-scheduler CVSS 3.1HIGH 8.8
See all 157 →

Sources

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