CVE-2026-45426

Exploitation 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.

• CWE-863

• https://github.com/apache/airflow/pull/66749Issue Tracking, Patch
• https://lists.apache.org/thread/hz1q7vg65vq2h4fobv5ww8tp257fbqj9Mailing List, Vendor Advisory
• http://www.openwall.com/lists/oss-security/2026/05/31/13Mailing List, Third Party Advisory

Published

Jun 1, 2026

Last Modified

Jul 21, 2026

Status

Analyzed

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