Red Hat Keycloak Single Sign-On Standard Token Exchange V2 certificate validation

Summaryinfo

A vulnerability classified as problematic was found in Red Hat Keycloak Single Sign-On. This impacts an unknown function of the component Standard Token Exchange V2. The manipulation results in certificate validation. This vulnerability is identified as CVE-2026-97846. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Red Hat Keycloak Single Sign-On (version unknown). Affected is an unknown function of the component Standard Token Exchange V2. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on integrity. CVE summarizes:

Keycloak provides a feature called mTLS holder-of-key binding which ensures that a token can only be used by the client that originally requested it by binding it to their digital certificate. A flaw was discovered where the new Standard Token Exchange V2 feature does not check for this certificate. This allows an attacker with stolen client credentials to obtain a standard, unrestricted token that bypasses these security protections.

The advisory is shared for download at access.redhat.com. This vulnerability is traded as CVE-2026-97846 since 09/25/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 09/25/2026). The MITRE ATT&CK project declares the attack technique as T1587.003.

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

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Red Hat

Name

• Keycloak Single Sign-On

License

• open-source

Website

• Vendor: https://www.redhat.com/

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Once again VulDB remains the best source for vulnerability data.

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