CVE-2026-71155 Missing authorization in Helidon
Low-privileged attackers can bypass authorization to read critical data and modify some data in Helidon web servers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71155?
CVE-2026-71155 is a high-severity missing authorization vulnerability in Oracle Helidon, published on 18 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 3.0.0-3.2.17. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Helidon. While the vulnerability is in Helidon, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Helidon accessible data as well as unauthorized update, insert or delete access to some of Helidon accessible data. CVSS 3.1 Base Score 8.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N).
Weakness: CWE-284
Which versions are affected by CVE-2026-71155?
It affects 1 product.
Products include Oracle Helidon.
How do I fix CVE-2026-71155?
No fix has been published for CVE-2026-71155 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-71155 being exploited?
There is no known exploitation of CVE-2026-71155 in the wild and no public exploit code.
Other vulnerabilities in Oracle Helidon
Sources
Also known as GHSA-fjwc-7cw5-fmxx.