CVE-2026-53712: OnGres SCRAM silent channel-binding authentication downgrade via unsupported certificate algorithms

July 1, 2026

A flaw in com.ongres.scram:scram-client allows an attacker capable of performing a TLS man-in-the-middle (MITM) attack to silently downgrade a connection from SCRAM-SHA-256-PLUS (with channel binding) to standard SCRAM-SHA-256 (without channel binding), bypassing strict client-side enforcement policies.

References

github.com/advisories/GHSA-p9jg-fcr6-3mhf
github.com/ongres/scram/security/advisories/GHSA-p9jg-fcr6-3mhf
nvd.nist.gov/vuln/detail/CVE-2026-53712

Code Behaviors & Features

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