CVE-2026-83439 Oracle Fusion Middleware Helidon - Broken Access Control

Oracle Fusion Middleware Helidon 3.0.0-3.2.20 and 4.0.0-4.5.4 contains an access control vulnerability in helidon-security-providers-idcs-mapper, letting low privileged attackers with network access via HTTP create, delete, or modify critical data, exploit requires low privilege network access.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.36% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Data Tampering, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
15 September 2026
Updated
15 October 2026
Weakness
CWE-284

Vendor fix

Update to a version later than 3.2.20 or 4.5.4 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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