{"id":"CVE-2026-53712","state":"PUBLISHED","title":"SCRAM: Silent channel-binding authentication downgrade via unsupported certificate algorithms","description":"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.","publishedAt":"2026-07-17T18:19:11.896Z","updatedAt":"2026-07-17T19:09:07.924Z","severity":{"score":8.2,"label":"High","version":"4.0","vector":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["ongres scram"],"affected":[{"vendor":"ongres","product":"scram","versions":[{"version":"< 3.3","status":"affected"}]}],"references":["https://github.com/ongres/scram/security/advisories/GHSA-p9jg-fcr6-3mhf","https://github.com/ongres/scram/releases/tag/3.3"],"weaknesses":["CWE-636","CWE-757"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53712.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53712","state":"PUBLISHED","datePublished":"2026-07-17T18:19:11.896Z","dateUpdated":"2026-07-17T19:09:07.924Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-10T16:43:31.241Z"},"containers":{"cna":{"title":"SCRAM: Silent channel-binding authentication downgrade via unsupported certificate algorithms","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"ongres","product":"scram","versions":[{"version":"< 3.3","status":"affected"}]}],"references":[{"url":"https://github.com/ongres/scram/security/advisories/GHSA-p9jg-fcr6-3mhf","name":"https://github.com/ongres/scram/security/advisories/GHSA-p9jg-fcr6-3mhf","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/ongres/scram/releases/tag/3.3","name":"https://github.com/ongres/scram/releases/tag/3.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-636","lang":"en","description":"CWE-636: Not Failing Securely ('Failing Open')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-757","lang":"en","description":"CWE-757: Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-17T18:19:11.896Z"},"source":{"advisory":"GHSA-p9jg-fcr6-3mhf","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-17T19:08:59.374984Z","id":"CVE-2026-53712","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-17T19:09:07.924Z"}}]}}}