CVE-2026-79650
Received Received - Intake

Open Redirect in Apache CXF OIDC Relying-Party

Publication date: 2026-10-09

Last updated on: 2026-10-09

Assigner: Apache Software Foundation

Description
Apache CXF’s 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 RP’s 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.

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Meta Information

Published
2026-10-09
Last Modified
2026-10-09
Generated
2026-10-09
AI Q&A
2026-10-09
EPSS Evaluated
N/A
NVD
CVE-2026-79650
EUVD
EUVD-2026-95697

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
Apache Software Foundation Apache CXF 4.2.0
Apache Software Foundation Apache CXF 4.0.0
Apache Software Foundation Apache CXF 0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-601 The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.

Attack-Flow Graph

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Executive Summary

Apache CXF’s OIDC relying-party component has a flaw where it redirects users to attacker-controlled URLs after authentication. The issue happens because state parameters controlled by attackers are preserved and used as redirect targets without checking if the final decoded URI belongs to the legitimate relying party's origin. Both directly encoded and double-encoded external URLs can exploit this.

Impact Analysis

This vulnerability could allow attackers to redirect you to malicious websites after you log in, potentially stealing your session tokens, credentials, or other sensitive data. It may also enable phishing attacks or further compromise your account or system.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection principles and HIPAA's security requirements for safeguarding protected health information. Organizations may face compliance penalties if user data is compromised due to this flaw.

Mitigation Strategies

Upgrade Apache CXF to versions 4.2.4, 4.1.9, or 3.6.13 to fix the vulnerability. Ensure the OIDC relying-party component is updated to prevent URL redirection attacks.

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