Apache CXF OIDC RP Open-Redirect (Before 4.2.4)
CVE-2026-79650 Published on October 9, 2026
Apache CXF: OIDC RP Open Redirect
Apache CXFs OIDC relying-party component could redirect users to an attacker-controlled URL after successful authentication. The issue occurs because attacker-controlled state parameters are preserved and later used as redirect targets without validating that the final decoded URI belongs to the RPs origin. Both directly encoded and double-encoded external URLs can trigger the issue, depending on which validation path is used. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.
Weakness Type
What is an Open Redirect Vulnerability?
A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. An http parameter may contain a URL value and could cause the web application to redirect the request to the specified URL. By modifying the URL value to a malicious site, an attacker may successfully launch a phishing scam and steal user credentials. Because the server name in the modified link is identical to the original site, phishing attempts have a more trustworthy appearance.
CVE-2026-79650 has been classified to as an Open Redirect vulnerability or weakness.
Products Associated with CVE-2026-79650
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Affected Versions
Apache Software Foundation Apache CXF:- Version 4.2.0 and below 4.2.4 is affected.
- Version 4.0.0 and below 4.1.9 is affected.
- Before 3.6.13 is affected.