{"id":3707,"date":"2026-09-04T18:42:42","date_gmt":"2026-09-04T10:42:42","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-42359"},"modified":"2026-09-04T18:42:42","modified_gmt":"2026-09-04T10:42:42","slug":"cve-2026-42359","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-42359","title":{"rendered":"CVE-2026-42359 [HIGH] &#8211; A bug in Apache Airflow&#8217;s XCom PATCH endpoint `PATCH \/api\/v2\/xcomEntries\/{key}` allowed an"},"content":{"rendered":"<p>A bug in Apache Airflow&#8217;s XCom PATCH endpoint `PATCH \/api\/v2\/xcomEntries\/{key}` allowed an authenticated UI\/API user with XCom write permission on a Dag to set XCom entries under reserved key names (e.g. `return_value`) that the matching POST endpoint already validated against `FORBIDDEN_XCOM_KEYS`. The endpoint also accepted serialized payload shapes the triggerer&#8217;s deserializer treats as code; combined, this allowed RCE on the triggerer when the affected task next deferred. Affects deployments where untrusted users have XCom write permission on Dags that defer to the triggerer. This is a fix-bypass of CVE-2026-33858: PR #64148 added the `FORBIDDEN_XCOM_KEYS` validator only on the POST\/set path; the PATCH path was not covered. Users who already upgraded for CVE-2026-33858 should additionally upgrade to `apache-airflow` 3.2.2 or later to cover the PATCH-path bypass.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A bug in Apache Airflow&#8217;s XCom PATCH endpoint `PATCH \/api\/v2\/xcomEntries\/{key}` allowed an authenticated UI\/API user with XCom write permission on a Dag to set XCom entries under reserved key names (e<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-3707","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/3707","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3707"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3707"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3707"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}