CVE-2026-92141
Description
A flaw was found in Jenkins Keycloak Authentication Plugin. This vulnerability allows attackers to perform phishing attacks due to an unrestricted redirect URL after a user logs in. By manipulating the redirect URL, an attacker can direct users to malicious sites, potentially compromising their credentials or system.
Statement
This vulnerability is rated as Moderate severity because successful exploitation requires user interaction to lure an authenticated victim through a specially crafted link, limiting the blast radius to credential phishing rather than arbitrary code execution or direct compromise of the underlying infrastructure. Red Hat products do not include or enable the third-party Keycloak Authentication plugin in default Jenkins distributions or OpenShift images. Only environments where administrators have explicitly deployed this optional plugin alongside their Jenkins controllers are subject to exposure.
Understanding the Weakness (CWE)
Access Control
Technical Impact: Bypass Protection Mechanism; Gain Privileges or Assume Identity
The user may be redirected to an untrusted page that contains malware which may then compromise the user's system. In some cases, an open redirect can also enable the immediate download of a file without the user's permission, because the redirection to an external site may lead to endpoints on those sites that automatically trigger a download action ("drive-by download" [REF-1478]). This will expose the user to extensive risk. The user's interaction with the web server may also be compromised if the malware conducts keylogging or other attacks that steal credentials, personally identifiable information (PII), or other important data.
Access Control,Confidentiality,Other
Technical Impact: Bypass Protection Mechanism; Gain Privileges or Assume Identity; Other
By modifying the URL value to a malicious site, an attacker may successfully launch a phishing scam. The user may be subjected to phishing attacks by being redirected to an untrusted page. The phishing attack may point to an attacker controlled web page that appears to be a trusted web site. The phishers may then steal the user's credentials and then use these credentials to access the legitimate web site. Because the server name in the modified link is identical to the original site, phishing attempts can appear more trustworthy.
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