{"id":"CVE-2026-110314","published":"2026-10-26T14:16:25.470","lastModified":"2026-10-26T16:59:16.113","description":"Client-Side Enforcement of Server-Side Security vulnerability in the WebSocket connection handling of mtrudel bandit allows a remote client to keep running WebSock handler code after the server has stopped its connection, via data frames sent after ignoring the server's Close frame.\n\nWhen a WebSock callback returns {:stop, ...}, Bandit.WebSocket.Connection calls terminate/2, sends Close and shuts down the write side, but keeps the connection process running in a :closing state. handle_frame/3 and handle_info/3 never check that state, so later frames still reach handle_in/2 and later messages reach handle_info/2, with the state from the stop tuple, until the client sends Close, TCP drops or the idle timeout fires. A client refused in init/1 after a failed token check could still run an admin-only action.\n\nThis issue affects bandit: from 0.5.1 before 1.14.0.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-602"],"vendors":[],"products":[],"references":[{"url":"https://cna.erlef.org/cves/CVE-2026-110314.html","tags":[]},{"url":"https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a","tags":[]},{"url":"https://github.com/mtrudel/bandit/commit/bb407f2277dcb65a58dd8cc07913a0b58a80e266","tags":[]},{"url":"https://github.com/mtrudel/bandit/security/advisories/GHSA-2v5v-8f9v-xh85","tags":[]},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-110314","tags":[]}],"exploitRefs":[{"url":"https://github.com/mtrudel/bandit/commit/220b9dfd27f9a21305be2afc75cbe585ddc24e7a","tags":[]},{"url":"https://github.com/mtrudel/bandit/commit/bb407f2277dcb65a58dd8cc07913a0b58a80e266","tags":[]},{"url":"https://github.com/mtrudel/bandit/security/advisories/GHSA-2v5v-8f9v-xh85","tags":[]}],"hasPoc":true,"ai":null}