{"id":"CVE-2026-59242","aliases":[],"cve":{"records":[{"id":"CVE-2026-59242","source":"apache","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-07-04T00:17:45.922Z","published":"2026-08-12T15:35:00.763Z","modified":"2026-11-03T06:58:51.061Z"}],"publishers":[{"name":"apache","role":"CNA","organizationId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","modified":"2026-11-03T06:58:51.061Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-08-12T16:41:55.648Z"},{"name":"CVE","role":"ADP","organizationId":"af854a3a-2127-422b-91ae-364da2661108","modified":"2026-08-12T17:20:18.016Z"}],"references":[{"url":"https://github.com/apache/airflow/pull/69378","tags":["patch"],"source":"apache"},{"url":"https://lists.apache.org/thread/dm0520yhh4mn7qknyoh45r2w6c5qg2mg","tags":["vendor-advisory"],"source":"apache"},{"url":"http://www.openwall.com/lists/oss-security/2026/08/12/6","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":"2026-08-12T16:41:51.650384Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Apache Airflow: Arbitrary airflow.* class instantiation on the API server via the XCom deserialize endpoint","titleSource":"apache","descriptionSource":"apache","description":"Apache Airflow's XCom `GET /api/v2/{...}/xcomEntries/{key}?deserialize=true` endpoint passed a string-literal payload through `BaseXCom.deserialize_value` without the `_check_forbidden_xcom_keys` guard, allowing an authenticated API user with XCom write-and-read access to instantiate arbitrary `airflow.*` classes on the API server (CWE-502). An authenticated user who can write an XCom value and then read it back with `deserialize=true` triggers the unsafe instantiation. Users are advised to upgrade to apache-airflow 3.3.1 or later, which rejects reserved XCom serialization keys submitted as JSON string literals.","score":5.4,"severity":"medium","published":"2026-08-12T15:35:00.763Z","modified":"2026-11-03T06:58:51.061Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Apache Software Foundation","name":"Apache Airflow","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"3.0.0","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:pypi/apache-airflow","packageIdentity":{"ecosystem":"PyPI","name":"apache-airflow"},"cpes":[],"source":"apache","url":"https://www.cve.org/CVERecord?id=CVE-2026-59242"},{"vendor":"Apache Software Foundation","name":"Apache Airflow","platforms":[],"versions":[{"version":"3.0.0","status":"affected","lessThan":"3.3.1","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-2026-59242"}],"remediation":[],"references":["https://github.com/apache/airflow/pull/69378","https://lists.apache.org/thread/dm0520yhh4mn7qknyoh45r2w6c5qg2mg","http://www.openwall.com/lists/oss-security/2026/08/12/6"],"sources":[{"name":"CVE","id":"CVE-2026-59242","modified":"2026-11-03T06:58:51.061Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-59242"}],"assessments":[{"source":"CISA-ADP","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","score":5.4}],"sourceAffected":[],"observedAt":"2026-11-03T07:11:25.255Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T00:40:33.739Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-03T07:30:33.722Z","attemptedAt":"2026-11-03T07:30:33.722Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-03T07:30:33.897Z","attemptedAt":"2026-11-03T07:30:33.897Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-03T07:30:34.141Z","attemptedAt":"2026-11-03T07:30:34.141Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-03T07:30:33.625Z","attemptedAt":"2026-11-03T07:30:33.625Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-59242","url":"https://www.first.org/epss/","probability":0.00529,"percentile":0.44753,"date":"2026-11-02","checkedAt":"2026-11-03T07:30:33.625Z"},{"source":"NVD","id":"CVE-2026-59242","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59242","modified":"2026-11-03T07:20:55.940","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","checkedAt":"2026-11-03T07:30:33.722Z"},{"source":"GitHub Advisory Database","id":"GHSA-fcmm-42r9-mmmm","url":"https://github.com/advisories/GHSA-fcmm-42r9-mmmm","modified":"2026-10-02T23:12:56Z","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","checkedAt":"2026-11-03T07:30:33.897Z"},{"source":"ENISA EUVD","id":"EUVD-2026-57312","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-57312","modified":"Sep 16, 2026, 2:55:43 PM","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","checkedAt":"2026-11-03T07:30:34.141Z"}],"aiSummary":{"text":"Apache Airflow versions before 3.3.1 are affected by a vulnerability allowing authenticated API users with XCom write-and-read access to instantiate arbitrary airflow.* classes. This occurs via the XCom deserialize endpoint. An attacker must have authenticated access to trigger the unsafe instantiation.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-03T07:16:10.058Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-59242"}]}}