SCRAM Authentication Flaw in Ongres Products
CVE-2026-53712

8.2HIGH

Key Information:

Vendor

Ongres

Status
Scram
Vendor
CVE Published:
17 July 2026

What is CVE-2026-53712?

A vulnerability exists within the SCRAM (Salted Challenge Response Authentication Mechanism) used in Ongres products that allows an attacker to perform a TLS man-in-the-middle attack. This flaw enables the attacker to downgrade a secure connection from SCRAM-SHA-256-PLUS with channel binding to a less secure standard SCRAM-SHA-256 without channel binding. When the TlsServerEndpoint processes an X.509 certificate using modern signature algorithms like Ed25519, it may lead to an empty byte array being returned, thus bypassing proper channel binding verification. This issue has been resolved in version 3.3.

Affected Version(s)

scram < 3.3

References

https://github.com/ongres/scram/security/advisories/GHSA-...
x_refsource_CONFIRM
https://github.com/ongres/scram/releases/tag/3.3
x_refsource_MISC

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.