{"id":"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.","aliases":["GHSA-p9jg-fcr6-3mhf"],"modified":"2026-07-19T03:47:17.385740677Z","published":"2026-07-17T18:19:11.896Z","database_specific":{"cwe_ids":["CWE-636","CWE-757"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53712.json","cna_assigner":"GitHub_M"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ongres/scram","events":[{"introduced":"0"},{"fixed":"f6bd6e20e34d4989ee34b06825791657a2cfd4fe"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.3"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["3.2","3.1","3.0","2.1","2.0","2.0-beta3","2.0-beta2","2.0-beta1","1.9-beta1","1.0.0-beta.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53712.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N"}]}