{"affected":[{"defaultStatus":"unaffected","ecosystem":"pypi","packageName":"apache-airflow-core","product":"Apache Airflow","source":"CNA: apache","vendor":"Apache Software Foundation","versions":[{"lessThan":"3.4.0","status":"affected","version":"3.0.0","versionType":"semver"}]}],"cveId":"CVE-2026-111421","cwes":["CWE-502"],"description":"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.","epss":null,"exploits":[],"kev":null,"metrics":[],"modifiedAt":1794215729744,"publishedAt":1794215729744,"references":[{"source":"CNA: apache","tags":["patch"],"url":"https://github.com/apache/airflow/pull/72718"},{"source":"CNA: apache","tags":["patch"],"url":"https://github.com/apache/airflow/pull/74829"},{"source":"CNA: apache","tags":["related"],"url":"https://www.cve.org/CVERecord?id=CVE-2026-59242"},{"source":"CNA: apache","tags":["vendor-advisory"],"url":"https://lists.apache.org/thread.html/pwdwx354tv0x3m8wzfhh59r6wyztj2lk"}],"remediation":[{"kind":"fix","source":"CNA: apache","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/apache/airflow/pull/72718"},{"kind":"fix","source":"CNA: apache","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/apache/airflow/pull/74829"}],"revision":"0ca9769cf6076677a5353ccc43cd09e053f10815b2e3e69a41d574fdac1ddd81","sources":[{"modifiedAt":1794215729744,"name":"CNA: apache","retrievedAt":1794218910017,"url":"https://www.cve.org/CVERecord?id=CVE-2026-111421"}],"ssvc":null,"status":"published","title":"Apache Airflow: Execution API: set_xcom skips the reserved-key check, so task-written XComs instantiate airflow.* classes on the API server","updatedAt":1794218910017}