{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-86829", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-09-08T14:27:44.182Z", "datePublished": "2026-11-09T09:52:44.345Z", "dateUpdated": "2026-11-09T10:13:19.317Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-11-09T09:52:44.345Z"}, "title": "Apache Airflow: Deserialization of task-controlled XCom values in the Scheduler during dependency evaluation", "problemTypes": [{"descriptions": [{"description": "CWE-502: Deserialization of Untrusted Data", "lang": "en", "cweId": "CWE-502", "type": "CWE"}]}], "source": {"discovery": "INTERNAL"}, "affected": [{"vendor": "Apache Software Foundation", "product": "Apache Airflow", "packageURL": "pkg:pypi/apache-airflow-core", "versions": [{"status": "affected", "version": "0", "lessThan": "3.4.0", "versionType": "semver"}], "defaultStatus": "unaffected", "collectionURL": "https://pypi.python.org", "packageName": "apache-airflow-core"}], "descriptions": [{"value": "Apache Airflow's scheduler fully deserializes XCom values written by task code while evaluating task dependencies. A Dag author, who controls what a task writes to XCom, therefore controls data that is deserialized inside the scheduler process - a context the Airflow security model reserves for code installed by the Deployment Manager, above the worker-scoped execution capability a Dag author is documented to have. Deployments that treat Dag authors as less trusted than Deployment Managers are affected, and the scheduler must be evaluating a task dependency that reads a task-written XCom value. Users of apache-airflow are recommended to upgrade to version 3.4.0 or later, which restricts dependency evaluation to primitive XCom values.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Apache Airflow's scheduler fully deserializes XCom values written by task code while evaluating task dependencies. A Dag author, who controls what a task writes to XCom, therefore controls data that is deserialized inside the scheduler process - a context the Airflow security model reserves for code installed by the Deployment Manager, above the worker-scoped execution capability a Dag author is documented to have. Deployments that treat Dag authors as less trusted than Deployment Managers are affected, and the scheduler must be evaluating a task dependency that reads a task-written XCom value. Users of apache-airflow are recommended to upgrade to version 3.4.0 or later, which restricts dependency evaluation to primitive XCom values."}]}], "references": [{"url": "https://github.com/apache/airflow/pull/72718", "tags": ["patch"]}, {"url": "https://lists.apache.org/thread.html/2qbt7qnclrlxtg3f1b685533r3mvk9hv", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "important"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "credits": [{"lang": "en", "value": "Claude Security Scans", "type": "tool"}, {"lang": "en", "value": "Jarek Potiuk", "type": "remediation developer"}], "x_generator": {"engine": "airflow-s/generate_cve_json.py"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/11/09/9"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-11-09T10:13:19.317Z"}}]}}

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{"affected": [{"affectedData": [{"collectionURL": "https://pypi.python.org", "defaultStatus": "unaffected", "packageName": "apache-airflow-core", "packageURL": "pkg:pypi/apache-airflow-core", "product": "Apache Airflow", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "3.4.0", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@apache.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Apache Airflow's scheduler fully deserializes XCom values written by task code while evaluating task dependencies. A Dag author, who controls what a task writes to XCom, therefore controls data that is deserialized inside the scheduler process - a context the Airflow security model reserves for code installed by the Deployment Manager, above the worker-scoped execution capability a Dag author is documented to have. Deployments that treat Dag authors as less trusted than Deployment Managers are affected, and the scheduler must be evaluating a task dependency that reads a task-written XCom value. Users of apache-airflow are recommended to upgrade to version 3.4.0 or later, which restricts dependency evaluation to primitive XCom values."}], "id": "CVE-2026-86829", "lastModified": "2026-11-09T10:17:13.757", "metrics": {}, "published": "2026-11-09T10:17:13.757", "references": [{"source": "security@apache.org", "url": "https://github.com/apache/airflow/pull/72718"}, {"source": "security@apache.org", "url": "https://lists.apache.org/thread.html/2qbt7qnclrlxtg3f1b685533r3mvk9hv"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "security@apache.org", "type": "Primary"}]}

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