{"id":"CVE-2026-86829","aliases":[],"cve":{"records":[{"id":"CVE-2026-86829","source":"apache","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-08T14:27:44.182Z","published":"2026-11-09T09:52:44.345Z","modified":"2026-11-12T19:53:43.226Z"}],"publishers":[{"name":"apache","role":"CNA","organizationId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","modified":"2026-11-09T09:52:44.345Z"},{"name":"CVE","role":"ADP","organizationId":"af854a3a-2127-422b-91ae-364da2661108","modified":"2026-11-09T10:13:19.317Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-12T19:53:43.226Z"}],"references":[{"url":"https://github.com/apache/airflow/pull/72718","tags":["patch"],"source":"apache"},{"url":"https://lists.apache.org/thread.html/2qbt7qnclrlxtg3f1b685533r3mvk9hv","tags":["vendor-advisory"],"source":"apache"},{"url":"http://www.openwall.com/lists/oss-security/2026/11/09/9","tags":[],"source":"CVE"}],"weaknesses":[{"id":"CWE-502","description":"CWE-502: Deserialization of Untrusted Data","source":"apache"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-12T19:53:28.244272Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"Apache Airflow: Deserialization of task-controlled XCom values in the Scheduler during dependency evaluation","titleSource":"apache","descriptionSource":"apache","description":"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values.","score":8.8,"severity":"high","published":"2026-11-09T09:52:44.345Z","modified":"2026-11-12T19:53:43.226Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Apache Software Foundation","name":"Apache Airflow","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"3.4.0","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:pypi/apache-airflow-core","packageIdentity":{"ecosystem":"PyPI","name":"apache-airflow-core"},"cpes":[],"source":"apache","url":"https://www.cve.org/CVERecord?id=CVE-2026-86829"}],"remediation":[],"references":["https://github.com/apache/airflow/pull/72718","https://lists.apache.org/thread.html/2qbt7qnclrlxtg3f1b685533r3mvk9hv","http://www.openwall.com/lists/oss-security/2026/11/09/9"],"sources":[{"name":"CVE","id":"CVE-2026-86829","modified":"2026-11-12T19:53:43.226Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-86829"}],"assessments":[{"source":"CISA-ADP","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8}],"sourceAffected":[],"observedAt":"2026-11-13T09:47:09.319Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T00:25:34.584Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-11-09T10:15:33.399Z","attemptedAt":"2026-11-09T10:15:33.399Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-09T10:15:33.399Z","attemptedAt":"2026-11-09T10:15:33.399Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-09T10:15:33.399Z","attemptedAt":"2026-11-09T10:15:33.399Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-09T10:15:33.399Z","attemptedAt":"2026-11-09T10:15:33.399Z"}],"evidence":[],"aiSummary":{"text":"Apache Airflow's scheduler deserializes task-controlled XCom values, allowing a DAG author to control data deserialized in the scheduler process. Affected versions are those less than 3.4.0. The scheduler must be evaluating a task dependency that reads a task-written XCom value.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-09T10:11:07.474Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-86829"}]}}