Red Hat AMQ Broker downgrade

Summaryinfo

A vulnerability was found in Red Hat AMQ Broker, Apicurio Registry, Data Grid, Debezium, Fuse, JBoss Enterprise Application Platform, Keycloak, Quarkus and Single Sign-On. It has been classified as problematic. This vulnerability affects unknown code. The manipulation leads to downgrade. This vulnerability is documented as CVE-2026-93568. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Red Hat AMQ Broker, Apicurio Registry, Data Grid, Debezium, Fuse, JBoss Enterprise Application Platform, Keycloak, Quarkus and Single Sign-On. This issue affects an unknown code block. The manipulation with an unknown input leads to a downgrade vulnerability. Using CWE to declare the problem leads to CWE-757. A protocol or its implementation supports interaction between multiple actors and allows those actors to negotiate which algorithm should be used as a protection mechanism such as encryption or authentication, but it does not select the strongest algorithm that is available to both parties. Impacted is integrity. The summary by CVE is:

HTTP/2 and HTTP/3 Extended CONNECT requests are downgraded as regular CONNECT requests

It is possible to read the advisory at access.redhat.com. The identification of this vulnerability is CVE-2026-93568 since 09/18/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/18/2026). The attack technique deployed by this issue is T1562.010 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Application Server Software

Vendor

• Red Hat

Name

• AMQ Broker
• Apicurio Registry
• Data Grid
• Debezium
• Fuse
• JBoss Enterprise Application Platform
• Keycloak
• Quarkus
• Single Sign-On

License

• open-source

Website

• Vendor: https://www.redhat.com/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion