{"id":"CVE-2026-45426","aliases":["GHSA-x5wm-j6wh-2834","BIT-airflow-2026-45426","PYSEC-2026-174"],"title":"Apache Airflow has an Incorrect Authorization issue","summary":"Apache Airflow has an Incorrect Authorization issue","severity":"low","cvss":3.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","vendor":"apache-airflow","product":"apache-airflow","ecosystem":"pip","affected":["apache-airflow >= 3.0.0, < 3.2.2"],"patched":["apache-airflow 3.2.2"],"published":"2026-06-01","updated":"2026-07-09","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-x5wm-j6wh-2834","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45426"},{"url":"https://github.com/apache/airflow/pull/66749"},{"url":"https://github.com/apache/airflow"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-174.yaml"},{"url":"https://lists.apache.org/thread/hz1q7vg65vq2h4fobv5ww8tp257fbqj9"},{"url":"http://www.openwall.com/lists/oss-security/2026/05/31/13"}],"tags":["osv","pip"],"epss":0.00358,"epssPercentile":0.29576,"ingestedAt":"2026-07-10T13:49:11.208Z","slug":"CVE-2026-45426","body":"## Overview\n\nExploitation requires the attacker to already be an authenticated Airflow worker holding a valid Log-server JWT issued for at least one Dag. Apache Airflow's Log server authorized JWT tokens against Dag IDs by applying Python's `str.lstrip()` to the requested path segment when verifying the JWT's `sub` claim. `str.lstrip()` strips any of a *set* of characters from the left (not a prefix), so a JWT issued for a Dag named e.g. `dag_a` would authorize log access to any other Dag whose name began with any subset of the characters `{d, a, g, _}` (e.g. `dag_attacker`, `aaaa_target`, `_dag_secret`). Such an authenticated worker could enumerate and read worker logs of other Dags whose names happened to share that character-class prefix, leaking task output and error traces beyond the documented per-Dag isolation boundary. Affects deployments relying on per-Dag log-access scoping (multi-team, shared-executor, shared-worker topologies). Users are advised to upgrade to `apache-airflow` 3.2.2 or later.\n\n## Affected packages\n\n- `apache-airflow >= 3.0.0, < 3.2.2`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `apache-airflow 3.2.2`","depth":"sunlit","depthScore":17,"depthScoreParts":{"impact":17.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}