{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2026-126072","sourceIdentifier":"security-advisories@github.com","published":"2026-11-10T21:19:25.413","lastModified":"2026-11-10T21:19:25.413","vulnStatus":"Received","cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"rails","product":"rails","versions":[{"version":"\u003e= 8.1, \u003c 8.1.4.1","status":"affected"},{"version":"\u003c 8.0.5.2","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":3.6}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Primary","description":[{"lang":"en","value":"CWE-833"}]}],"references":[{"url":"https://github.com/rails/rails/commit/27ad18ed5900dee28ba20e9c6fc718ff751fa215","source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/commit/ccbfc09690fef05fdd2a9969c917a71b92cc98fc","source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/releases/tag/v8.0.5.2","source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/releases/tag/v8.1.4.1","source":"security-advisories@github.com"},{"url":"https://github.com/rails/rails/security/advisories/GHSA-rwvh-fw6r-pwvp","source":"security-advisories@github.com"}]}}