{"id":"CVE-2026-123612","published":"2026-11-08T02:16:56.597","lastModified":"2026-11-08T02:16:56.597","description":"rustls 0.23.44 and 0.23.45 contain an information disclosure vulnerability that sends application data buffered before the handshake completes to the client-facing server when Encrypted Client Hello is rejected. Because start_traffic() queues plaintext from ClientConnection::writer() before sending the ech_required alert, the authenticated public_name server receives data intended for the inner server.","cvssScore":2.3,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N","cwes":["CWE-696"],"vendors":[],"products":[],"references":[{"url":"https://github.com/rustls/rustls/security/advisories/GHSA-vp88-798v-h67f","tags":[]},{"url":"https://www.vulncheck.com/advisories/rustls-0.23.44-and-0.23.45-ech-rejection-application-data-disclosure","tags":[]}],"exploitRefs":[{"url":"https://github.com/rustls/rustls/security/advisories/GHSA-vp88-798v-h67f","tags":[]}],"hasPoc":true,"ai":null}