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TI-2026-38732 Aliases CVE-2026-53712GHSA-p9jg-fcr6-3mhf

SCRAM: Silent channel-binding authentication downgrade via unsupported certificate algorithms

Priority LOW 35CWE-636Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 2 fixed, 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0026 17th percentileScored 2026-11-07
Fix Partial scram (ongres): 3.3com.ongres.scram:scram-client (Maven): 3.3+1 more productRed Hat: 2 advisoriesRed Hat: 2 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ongresscrambefore 3.33.3Patch availableCNA
—com.ongres.scram:scram-client (Maven)before 3.33.3Patch availableGHSA-p9jg-fcr6-3mhf
—com.ongres.scram:scram-common (Maven)before 3.33.3Patch availableGHSA-p9jg-fcr6-3mhf
  • scram Vendorongres Affected before 3.3 Fixed in 3.3 Patch available CNA
  • com.ongres.scram:scram-client (Maven) Vendor— Affected before 3.3 Fixed in 3.3 Patch available GHSA-p9jg-fcr6-3mhf
  • com.ongres.scram:scram-common (Maven) Vendor— Affected before 3.3 Fixed in 3.3 Patch available GHSA-p9jg-fcr6-3mhf

Remediation

  • Fix · CNA scram (ongres) Fixed in 3.3
  • Fix · GHSA-p9jg-fcr6-3mhf com.ongres.scram:scram-client (Maven) Fixed in 3.3 Advisory →
  • Fix · GHSA-p9jg-fcr6-3mhf com.ongres.scram:scram-common (Maven) Fixed in 3.3 Advisory →

Red Hat 2 advisories

  • RHSA-2026:53643 Released 2026-08-13 · Red Hat rating Important
    Red Hat build of Quarkus 3.27.5 release and security update
    • Red Hat build of Quarkus 3.27.5
  • RHSA-2026:51653 Released 2026-08-13 · Red Hat rating Important
    Red Hat build of Quarkus 3.33.3 release and security update
    • Red Hat build of Quarkus 3.33.3

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat JBoss Enterprise Application Platform Expansion PackAffectedNo fix yet: Fix deferred
Red Hat build of Quarkus 3.27.5Fixed RHSA-2026:53643
Red Hat build of Quarkus 3.33.3Fixed RHSA-2026:51653

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53712
  2. 2026-10-03 Alias added: GHSA-p9jg-fcr6-3mhf

References

Other 3

  • TI-2026-54356 Untrusted Search Path in StackGres CVSS 3.1CRITICAL 9.9
  • TI-2025-36984 Timing Attack Vulnerability in SCRAM Authentication CVSS 4.0MEDIUM 6.6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences