{"apiVersion":"1.0","identifier":"CVE-2026-67587","description":"Apache Airflow-s Task SDK rebuilt a `Callback` object from serialized data by re-running its constructor, which imports the module named by the stored callback path. Because `SyncCallback` is itself an Airflow class it passes the default `allowed_deserialization_classes` allow-list, so tightening that setting does not help. A Dag author — who controls a task instance-s `next_kwargs` through the task execution API — can therefore cause an arbitrary module to be imported inside the scheduler process, when the scheduler-s `awaiting_input` timeout sweep deserializes that value. No non-default configuration is required; the sweep runs unconditionally. Versions before 3.3.0 are not affected: the class existed, but the scheduler sweep that reaches it did not. This is a separate code path from CVE-2026-58076 and CVE-2026-67260, which cover different gadgets reaching deserialization — applying either of those fixes does not address this one. Users are advised to upgrade to apache-airflow 3.3.1 or later.","publishedAt":"2026-08-12T16:17:15","lastModifiedAt":"2026-08-17T19:08:20","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67587","cvssScore":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00611,"riskScore":0.93,"affectedProduct":"apache-airflow","affectedVersions":"<3.3.1","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-67587","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-67587","en":"https://www.redsauce.net/en/cves/CVE-2026-67587","fr":"https://www.redsauce.net/fr/cves/CVE-2026-67587","pt":"https://www.redsauce.net/pt/cves/CVE-2026-67587","de":"https://www.redsauce.net/de/cves/CVE-2026-67587","sk":"https://www.redsauce.net/sk/cves/CVE-2026-67587","el":"https://www.redsauce.net/el/cves/CVE-2026-67587"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-67587"}}