CVE-2026-53712 SCRAM: Silent channel-binding authentication downgrade via unsupported certificate algorithms
An attacker can bypass SCRAM channel binding security features via TLS man-in-the-middle attacks when modern certificate algorithms are used.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53712?
CVE-2026-53712 is a high-severity vulnerability in ongres scram, published on 17 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-53712?
4 open source packages ship an affected version, including com.ongres.scram:scram-client and com.ongres.scram:scram-common.
| Package | Affected | Fixed in |
|---|---|---|
com.ongres.scram:scram-client Maven | All versions | 3.3 |
com.ongres.scram:scram-client Maven | All versions | 3.3 |
com.ongres.scram:scram-common Maven | All versions | 3.3 |
com.ongres.scram:scram-common Maven | All versions | 3.3 |
How do I fix CVE-2026-53712?
Upgrade com.ongres.scram:scram-client to 3.3 or later.
Is CVE-2026-53712 being exploited?
There is no known exploitation of CVE-2026-53712 in the wild and no public exploit code.
Sources
Also known as GHSA-p9jg-fcr6-3mhf.