{"id":"CVE-2026-53712","aliases":["GHSA-p9jg-fcr6-3mhf"],"url":"https://o3.security/vulnerability/CVE-2026-53712","summary":"SCRAM: Silent channel-binding authentication downgrade via unsupported certificate algorithms","details":"SCRAM (Salted Challenge Response Authentication Mechanism) is part of the family of Simple Authentication and Security Layer (SASL, RFC 4422) authentication mechanisms. Prior to 3.3, a flaw in com.ongres.scram:scram-client and com.ongres.scram:scram-common allows an attacker capable of a TLS man-in-the-middle attack to silently downgrade a connection from SCRAM-SHA-256-PLUS with channel binding to standard SCRAM-SHA-256 without channel binding when TlsServerEndpoint processes an X.509 certificate using a modern signature algorithm such as Ed25519; getChannelBindingData() can return an empty byte array after NoSuchAlgorithmException, and the ScramClient builder treats that as absent channel-binding data. This issue is fixed in version 3.3.","published":"2026-07-17T18:19:11.896Z","modified":"2026-08-12T03:51:29.119420920Z","cvss":null,"epss":{"score":0.0026,"percentile":0.17461,"asOf":"2026-09-01"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"com.ongres.scram:scram-client","fixedVersion":"3.3"},{"ecosystem":"Maven","name":"com.ongres.scram:scram-common","fixedVersion":"3.3"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/ongres/scram/releases/tag/3.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53712.json"},{"type":"ADVISORY","url":"https://github.com/ongres/scram/security/advisories/GHSA-p9jg-fcr6-3mhf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53712"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:29.119420920Z"}}