CVE-2026-93649
Description
A flaw was found in adoptium.net. A remote attacker can trick a user into downloading malicious software by convincing them to visit a specially crafted link. The website's download page checks destination URLs against trusted prefixes without resolving relative path sequences, allowing navigation to an attacker-controlled server. Consequently, a victim sees the genuine download confirmation page while their browser automatically downloads an unauthorized binary chosen by the attacker.
Statement
This vulnerability is rated with Moderate severity because successful exploitation requires user interaction to follow a deceptive link, and the issue is confined entirely to the external adoptium.net web service. Red Hat products do not package, deploy, or run the Eclipse Adoptium website application. As a result, Red Hat enterprise offerings and runtime environments are not directly affected by this flaw.
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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