FKIE_CVE-2026-67587

Vulnerability from fkie_nvd - Published: 2026-08-12 16:17 - Updated: 2026-08-12 20:50
Severity
Summary
Apache Airflow's Task SDK rebuilt a `Callback` object from serialized data by re-running its constructor, which imports the module named by the stored callback path. Because `SyncCallback` is itself an Airflow class it passes the default `allowed_deserialization_classes` allow-list, so tightening that setting does not help. A Dag author — who controls a task instance's `next_kwargs` through the task execution API — can therefore cause an arbitrary module to be imported inside the scheduler process, when the scheduler's `awaiting_input` timeout sweep deserializes that value. No non-default configuration is required; the sweep runs unconditionally. Versions before 3.3.0 are not affected: the class existed, but the scheduler sweep that reaches it did not. This is a separate code path from CVE-2026-58076 and CVE-2026-67260, which cover different gadgets reaching deserialization — applying either of those fixes does not address this one. Users are advised to upgrade to apache-airflow 3.3.1 or later.
References
security@apache.orghttps://github.com/apache/airflow/pull/70704
security@apache.orghttps://lists.apache.org/thread/o00ww4n69qojvsckb464dtwd2nhzy6t0
security@apache.orghttps://www.cve.org/CVERecord?id=CVE-2026-58076
security@apache.orghttps://www.cve.org/CVERecord?id=CVE-2026-67260
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://pypi.python.org",
          "defaultStatus": "unaffected",
          "packageName": "apache-airflow",
          "product": "Apache Airflow",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThan": "3.3.1",
              "status": "affected",
              "version": "3.3.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@apache.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Apache Airflow\u0027s Task SDK rebuilt a `Callback` object from serialized data by re-running its constructor, which imports the module named by the stored callback path. Because `SyncCallback` is itself an Airflow class it passes the default `allowed_deserialization_classes` allow-list, so tightening that setting does not help. A Dag author \u2014 who controls a task instance\u0027s `next_kwargs` through the task execution API \u2014 can therefore cause an arbitrary module to be imported inside the scheduler process, when the scheduler\u0027s `awaiting_input` timeout sweep deserializes that value. No non-default configuration is required; the sweep runs unconditionally. Versions before 3.3.0 are not affected: the class existed, but the scheduler sweep that reaches it did not. This is a separate code path from CVE-2026-58076 and CVE-2026-67260, which cover different gadgets reaching deserialization \u2014 applying either of those fixes does not address this one. Users are advised to upgrade to apache-airflow 3.3.1 or later."
    }
  ],
  "id": "CVE-2026-67587",
  "lastModified": "2026-08-12T20:50:58.370",
  "metrics": {},
  "published": "2026-08-12T16:17:15.090",
  "references": [
    {
      "source": "security@apache.org",
      "url": "https://github.com/apache/airflow/pull/70704"
    },
    {
      "source": "security@apache.org",
      "url": "https://lists.apache.org/thread/o00ww4n69qojvsckb464dtwd2nhzy6t0"
    },
    {
      "source": "security@apache.org",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-58076"
    },
    {
      "source": "security@apache.org",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-67260"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "security@apache.org",
      "type": "Primary"
    }
  ]
}



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