Red Hat Build of Keycloak keycloak-services password recovery

Summaryinfo

A vulnerability marked as critical has been reported in Red Hat Build of Keycloak. Affected by this issue is some unknown functionality of the component keycloak-services. This manipulation causes password recovery. This vulnerability appears as CVE-2026-18963. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in Red Hat Build of Keycloak (the affected version is unknown). Affected by this vulnerability is an unknown code of the component keycloak-services. The manipulation with an unknown input leads to a password recovery vulnerability. The CWE definition for the vulnerability is CWE-640. The product contains a mechanism for users to recover or change their passwords without knowing the original password, but the mechanism is weak. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in the reset-credentials flow of the keycloak-services component, which is the core engine for identity and access management in Red Hat Build of Keycloak. The issue allows an unauthenticated attacker to force the password reset process for any user without needing to click the required email verification link. This can result in the attacker gaining full control over target user accounts by directly setting new credentials.

It is possible to read the advisory at access.redhat.com. This vulnerability is known as CVE-2026-18963 since 08/05/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 08/21/2026). The attack technique deployed by this issue is T1552 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 338317 (Keycloak 26.4.x < 26.4.15 / 26.6.x < 26.6.6 Unauthenticated Account Takeover), which helps to determine the existence of the flaw in a target environment.

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

The vulnerability is also documented in the databases at Tenable (338317) and EUVD (EUVD-2026-61063). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• Red Hat

Name

• Build of Keycloak

License

• open-source

Website

• Vendor: https://www.redhat.com/

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

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