{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-111421", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-10-16T02:28:03.557Z", "datePublished": "2026-11-09T09:15:29.744Z", "dateUpdated": "2026-11-09T09:15:29.744Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-11-09T09:15:29.744Z"}, "title": "Apache Airflow: Execution API: set_xcom skips the reserved-key check, so task-written XComs instantiate airflow.* classes on the API server", "problemTypes": [{"descriptions": [{"description": "CWE-502: Deserialization of Untrusted Data", "lang": "en", "cweId": "CWE-502", "type": "CWE"}]}], "source": {"discovery": "EXTERNAL"}, "affected": [{"vendor": "Apache Software Foundation", "product": "Apache Airflow", "packageURL": "pkg:pypi/apache-airflow-core", "versions": [{"status": "affected", "version": "3.0.0", "lessThan": "3.4.0", "versionType": "semver"}], "defaultStatus": "unaffected", "collectionURL": "https://pypi.python.org", "packageName": "apache-airflow-core"}], "descriptions": [{"value": "Apache Airflow's Task Execution API stored XCom values written by a task without the reserved-key check applied elsewhere, so a Dag author's task could write an XCom that, when a user later viewed it through the API with deserialization enabled, made the API server instantiate classes from the `airflow.*` namespace with arguments the Dag author chose. This is an incomplete fix for CVE-2026-59242: users who applied that fix in apache-airflow 3.3.1 remain affected through this route and should upgrade to apache-airflow 3.4.0 or later.", "lang": "en", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Apache Airflow's Task Execution API stored XCom values written by a task without the reserved-key check applied elsewhere, so a Dag author's task could write an XCom that, when a user later viewed it through the API with deserialization enabled, made the API server instantiate classes from the `airflow.*` namespace with arguments the Dag author chose. This is an incomplete fix for CVE-2026-59242: users who applied that fix in apache-airflow 3.3.1 remain affected through this route and should upgrade to apache-airflow 3.4.0 or later."}]}], "references": [{"url": "https://github.com/apache/airflow/pull/72718", "tags": ["patch"]}, {"url": "https://github.com/apache/airflow/pull/74829", "tags": ["patch"]}, {"url": "https://www.cve.org/CVERecord?id=CVE-2026-59242", "tags": ["related"]}, {"url": "https://lists.apache.org/thread.html/pwdwx354tv0x3m8wzfhh59r6wyztj2lk", "tags": ["vendor-advisory"]}], "metrics": [{"other": {"type": "Textual description of severity", "content": {"text": "moderate"}}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "credits": [{"lang": "en", "value": "Qi Qin of depthfirst", "type": "finder"}, {"lang": "en", "value": "Hama1cco", "type": "finder"}, {"lang": "en", "value": "Zhixi \"Jace\" Sun, independent security researcher", "type": "finder"}, {"lang": "en", "value": "Michael Lip (theluckystrike)", "type": "finder"}, {"lang": "en", "value": "Jarek Potiuk", "type": "remediation developer"}], "x_generator": {"engine": "airflow-s/generate_cve_json.py"}}}}

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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": "3.0.0", "versionType": "semver"}]}], "source": "[email protected]"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Apache Airflow's Task Execution API stored XCom values written by a task without the reserved-key check applied elsewhere, so a Dag author's task could write an XCom that, when a user later viewed it through the API with deserialization enabled, made the API server instantiate classes from the `airflow.*` namespace with arguments the Dag author chose. This is an incomplete fix for CVE-2026-59242: users who applied that fix in apache-airflow 3.3.1 remain affected through this route and should upgrade to apache-airflow 3.4.0 or later."}], "id": "CVE-2026-111421", "lastModified": "2026-11-09T10:17:03.773", "metrics": {}, "published": "2026-11-09T10:17:03.773", "references": [{"source": "[email protected]", "url": "https://github.com/apache/airflow/pull/72718"}, {"source": "[email protected]", "url": "https://github.com/apache/airflow/pull/74829"}, {"source": "[email protected]", "url": "https://lists.apache.org/thread.html/pwdwx354tv0x3m8wzfhh59r6wyztj2lk"}, {"source": "[email protected]", "url": "https://www.cve.org/CVERecord?id=CVE-2026-59242"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "[email protected]", "type": "Primary"}]}

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