CVE-2026-58076: Apache airflow Apache Airflow Exception-node Deserialization Permits Vulnerability

HIGH
Advisory Identifier: GHSA-8prw-8m6x-8w6f
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CVSS 8.8
CWE-502
Published
Advisory Summary

CVE-2026-58076 is a HIGH (CVSS 8.8) apache airflow exception-node deserialization permits vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Apache airflow libraries in the PyPI ecosystem. The issue involves apache airflow exception-node deserialization permits arbitrary callable execution. Remediation is available by upgrading affected packages to version 3.3.1.

CVE-2026-58076 at a Glance

CVE Identifier CVE-2026-58076
GHSA Identifier GHSA-8prw-8m6x-8w6f
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Apache airflow
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 8.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-58076

To remediate this vulnerability, upgrade all affected Apache airflow dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

apache-airflow fixed: 3.3.1 
pip install apache-airflow>=3.3.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show apache-airflow

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-58076, inspect your installed packages using pip:

pip show apache-airflow

Analyze the terminal output to locate any version of Apache airflow in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.3.1), your application is affected.

Note: The pip show apache-airflow command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Apache airflow, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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`.

CVE-2026-58076 Affected Apache airflow Versions

1 component(s)
Fixed Versions:
3.3.1
Product / Package Ecosystem Affected Versions Fixed Version
apache-airflow
pypi/apache-airflow
PyPI
≥ 3.3.0
< 3.3.1
3.3.1

References

NVD — CVE-2026-58076 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-58076
Apache airflow Source Repository REPOSITORY
https://github.com/apache/airflow/pull/68511
Security Fix Commit FIX COMMIT
https://github.com/apache/airflow/commit/3a08a3d7792335ac9456cd44c92d8de3ae0d6ec1
Security Fix Commit FIX COMMIT
https://github.com/apache/airflow/commit/560f117525d201ed64327c4185050705339e07b1
Apache airflow Source Repository REPOSITORY
https://github.com/apache/airflow
Apache airflow Release RELEASE
https://github.com/apache/airflow/releases/tag/3.3.1
Apache airflow Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-3991.yaml
lists.apache.org/thread/t81p688t15jo... WEB
https://lists.apache.org/thread/t81p688t15jozxsng8521o60nh2kfsos
CVE Official Record — CVE-2026-58076 CVE
https://www.cve.org/CVERecord?id=CVE-2026-33264

Frequently Asked Questions

What is CVE-2026-58076?
CVE-2026-58076 is a security vulnerability in Apache airflow involving Apache Airflow exception-node deserialization permits arbitrary callable execution under CWE-502: Deserialization of Untrusted Data.
Which Apache airflow versions are affected?
Affected versions include releases prior to 3.3.1 across affected packages: apache-airflow.
What version fixes CVE-2026-58076?
Upgrading to 3.3.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is apache-airflow affected?
Yes, apache-airflow is affected in releases prior to 3.3.1. Upgrade your dependency to 3.3.1 or later.
What is the CVSS score of CVE-2026-58076?
CVE-2026-58076 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-58076?
CVE-2026-58076 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check PyPI dependencies for CVE-2026-58076?
Run the dependency tree command: 'pip show apache-airflow'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-8prw-8m6x-8w6f",
  "modified" : "2026-10-02T23:12:35Z",
  "published" : "2026-08-12T18:31:17Z",
  "aliases" : [ "CVE-2026-58076" ],
  "summary" : "Apache Airflow exception-node deserialization permits arbitrary callable execution",
  "details" : "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`.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "apache-airflow"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.3.0"
      }, {
        "fixed" : "3.3.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-58076"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/pull/68511"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/commit/3a08a3d7792335ac9456cd44c92d8de3ae0d6ec1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/commit/560f117525d201ed64327c4185050705339e07b1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/apache/airflow"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/airflow/releases/tag/3.3.1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-3991.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/t81p688t15jozxsng8521o60nh2kfsos"
  }, {
    "type" : "WEB",
    "url" : "https://www.cve.org/CVERecord?id=CVE-2026-33264"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-02T23:12:35Z",
    "nvd_published_at" : "2026-08-12T16:17:08Z"
  }
}