{"id":"DEBIAN-CVE-2026-126072","details":"Action Pack is a framework for handling and responding to web requests. Prior to 8.1.4.1 and 8.0.5.2, ActionController::Live::Buffer#close pushes its end-of-stream marker onto the response's bounded queue while it holds the buffer's monitor. When the client has stopped reading and the queue is full, the push blocks, and Buffer#abort, which runs when the client disconnects or a write times out, waits indefinitely for the same monitor. Each such response could permanently hold a web server thread and its ActionController::Live thread, possibly resulting in a DoS vulnerability through thread exhaustion. Applications that stream responses with ActionController::Live, including send_stream, are affected. Applications that serve large files through Active Storage proxy mode are exposed to unauthenticated clients. This issue is fixed in versions 8.1.4.1 and 8.0.5.2.","modified":"2026-11-11T11:00:05.751886965Z","published":"2026-11-10T21:19:25.413Z","upstream":["CVE-2026-126072"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-126072"}],"affected":[{"package":{"name":"rails","ecosystem":"Debian:12","purl":"pkg:deb/debian/rails?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:6.1.7.10+dfsg-1~deb12u1","2:6.1.7.10+dfsg-1~deb12u2","2:6.1.7.10+dfsg-1~deb12u3","2:6.1.7.3+dfsg-1","2:6.1.7.3+dfsg-10","2:6.1.7.3+dfsg-11","2:6.1.7.3+dfsg-12","2:6.1.7.3+dfsg-13","2:6.1.7.3+dfsg-2","2:6.1.7.3+dfsg-2~deb12u1","2:6.1.7.3+dfsg-3","2:6.1.7.3+dfsg-4","2:6.1.7.3+dfsg-5","2:6.1.7.3+dfsg-6","2:6.1.7.3+dfsg-7","2:6.1.7.3+dfsg-7~exp1","2:6.1.7.3+dfsg-8","2:6.1.7.3+dfsg-9","2:7.2.2.1+dfsg-1","2:7.2.2.1+dfsg-1~exp1","2:7.2.2.1+dfsg-1~exp2","2:7.2.2.1+dfsg-1~exp3","2:7.2.2.1+dfsg-1~exp4","2:7.2.2.1+dfsg-1~exp6","2:7.2.2.1+dfsg-2","2:7.2.2.1+dfsg-3","2:7.2.2.1+dfsg-4","2:7.2.2.1+dfsg-5","2:7.2.2.1+dfsg-6","2:7.2.2.1+dfsg-7","2:7.2.2.2+dfsg-1","2:7.2.2.2+dfsg-2","2:7.2.2.2+dfsg-2~deb13u1","2:7.2.2.2+dfsg-2~deb13u2","2:7.2.3+dfsg-1","2:7.2.3+dfsg-2","2:7.2.3+dfsg-3","2:7.2.3.1+dfsg-1","2:7.2.3.2+dfsg-1","2:7.2.3.2+dfsg-2","2:7.2.3.2+dfsg-3","2:7.2.4+dfsg-1","2:7.2.4+dfsg-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-126072.json"}},{"package":{"name":"rails","ecosystem":"Debian:13","purl":"pkg:deb/debian/rails?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:7.2.2.1+dfsg-7","2:7.2.2.2+dfsg-1","2:7.2.2.2+dfsg-2","2:7.2.2.2+dfsg-2~deb13u1","2:7.2.2.2+dfsg-2~deb13u2","2:7.2.3+dfsg-1","2:7.2.3+dfsg-2","2:7.2.3+dfsg-3","2:7.2.3.1+dfsg-1","2:7.2.3.2+dfsg-1","2:7.2.3.2+dfsg-2","2:7.2.3.2+dfsg-3","2:7.2.4+dfsg-1","2:7.2.4+dfsg-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-126072.json"}},{"package":{"name":"rails","ecosystem":"Debian:14","purl":"pkg:deb/debian/rails?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2:7.2.2.1+dfsg-7","2:7.2.2.2+dfsg-1","2:7.2.2.2+dfsg-2","2:7.2.2.2+dfsg-2~deb13u1","2:7.2.2.2+dfsg-2~deb13u2","2:7.2.3+dfsg-1","2:7.2.3+dfsg-2","2:7.2.3+dfsg-3","2:7.2.3.1+dfsg-1","2:7.2.3.2+dfsg-1","2:7.2.3.2+dfsg-2","2:7.2.3.2+dfsg-3","2:7.2.4+dfsg-1","2:7.2.4+dfsg-2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-126072.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}