CVE-2026-79650
Apache CXF: OIDC RP Open Redirect
Apache Software Foundation Apache CXF
CVSS
6.1MediumExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.36%Chance of exploitation activity in the next 30 days, higher than 28% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
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.
Text from CVE List
Affected versions 3
- Apache CXFaffected: 4.2.0 before 4.2.4CVE List
- Apache CXFaffected: 4.0.0 before 4.1.9CVE List
- Apache CXFaffected: all versions before 3.6.13CVE List