{"id":"CVE-2026-126072","published":"2026-11-10T21:19:25.413","lastModified":"2026-11-10T21:19:25.413","description":"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.","cvssScore":5.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-833"],"vendors":[],"products":[],"references":[{"url":"https://github.com/rails/rails/commit/27ad18ed5900dee28ba20e9c6fc718ff751fa215","tags":[]},{"url":"https://github.com/rails/rails/commit/ccbfc09690fef05fdd2a9969c917a71b92cc98fc","tags":[]},{"url":"https://github.com/rails/rails/releases/tag/v8.0.5.2","tags":[]},{"url":"https://github.com/rails/rails/releases/tag/v8.1.4.1","tags":[]},{"url":"https://github.com/rails/rails/security/advisories/GHSA-rwvh-fw6r-pwvp","tags":[]}],"exploitRefs":[{"url":"https://github.com/rails/rails/commit/27ad18ed5900dee28ba20e9c6fc718ff751fa215","tags":[]},{"url":"https://github.com/rails/rails/commit/ccbfc09690fef05fdd2a9969c917a71b92cc98fc","tags":[]},{"url":"https://github.com/rails/rails/releases/tag/v8.0.5.2","tags":[]},{"url":"https://github.com/rails/rails/releases/tag/v8.1.4.1","tags":[]},{"url":"https://github.com/rails/rails/security/advisories/GHSA-rwvh-fw6r-pwvp","tags":[]}],"hasPoc":true,"ai":null}