{"apiVersion":"1.0","identifier":"CVE-2026-59242","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.","publishedAt":"2026-08-12T16:17:09","lastModifiedAt":"2026-08-14T18:18:03","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-59242","cvssScore":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","epssProbability":0.00584,"riskScore":0.57,"affectedProduct":"Apache Airflow","affectedVersions":"<3.3.1","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-59242","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-59242","en":"https://www.redsauce.net/en/cves/CVE-2026-59242","fr":"https://www.redsauce.net/fr/cves/CVE-2026-59242","pt":"https://www.redsauce.net/pt/cves/CVE-2026-59242","de":"https://www.redsauce.net/de/cves/CVE-2026-59242","sk":"https://www.redsauce.net/sk/cves/CVE-2026-59242","el":"https://www.redsauce.net/el/cves/CVE-2026-59242"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-59242"}}