{"affected":[{"defaultStatus":"unaffected","ecosystem":"pypi","packageName":"apache-airflow-core","product":"Apache Airflow","source":"CNA: apache","vendor":"Apache Software Foundation","versions":[{"lessThan":"3.2.2","status":"affected","version":"3.0.0","versionType":"semver"}]}],"cveId":"CVE-2026-45426","cwes":["CWE-863"],"description":"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.","epss":{"date":"2026-11-02","percentile":0.29506,"score":0.00358},"exploits":[],"kev":null,"metrics":[{"score":3.1,"severity":"low","source":"ADP: CISA-ADP","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}],"modifiedAt":1793689031563,"publishedAt":1780300036636,"references":[{"source":"CNA: apache","tags":["patch"],"url":"https://github.com/apache/airflow/pull/66749"},{"source":"CNA: apache","tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/hz1q7vg65vq2h4fobv5ww8tp257fbqj9"},{"source":"ADP: CVE","tags":[],"url":"http://www.openwall.com/lists/oss-security/2026/05/31/13"}],"remediation":[{"kind":"fix","source":"CNA: apache","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/apache/airflow/pull/66749"}],"revision":"3a461a6a469c6bd8d0b8e02591386753a81ba62f9cd3d0311e4ee8245b718235","sources":[{"modifiedAt":1793689031563,"name":"CNA: apache","retrievedAt":1793689758278,"url":"https://www.cve.org/CVERecord?id=CVE-2026-45426"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793689787310,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-45426"}],"ssvc":{"assessedAt":1780325903963,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Apache Airflow: Log server JWT authorization bypass via Python lstrip() character stripping allows cross-Dag log access","updatedAt":1793689787310}