# CVE-2026-73903: Missing authorization in Helidon

> Unauthenticated attackers can modify or delete critical data in Helidon due to missing authorization checks.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Aug 2026
- **Updated:** 28 Aug 2026
- **Also known as:** GHSA-9pr8-f4gj-9hr5

## What is CVE-2026-73903?

CVE-2026-73903 is a high-severity missing authorization vulnerability in Oracle Helidon, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, 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 4.0.0-4.5.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon.  Successful attacks of this vulnerability can result in  unauthorized creation, deletion or modification access to critical data or all Helidon accessible data. CVSS 3.1 Base Score 7.5 (Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-73903?

It affects 1 product.


Products: Oracle Helidon.

## How do I fix CVE-2026-73903?

No fix has been published for CVE-2026-73903 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-73903 being exploited?

There is no known exploitation of CVE-2026-73903 in the wild and no public exploit code.

## Other vulnerabilities in Oracle Helidon

- [CVE-2026-73930](https://insights.sbomify.com/CVE-2026-73930/): Missing authorization in Helidon (critical 9.9)
- [CVE-2026-71074](https://insights.sbomify.com/CVE-2026-71074/): Auth bypass in Helidon (critical 9.8)
- [CVE-2026-71152](https://insights.sbomify.com/CVE-2026-71152/): Auth bypass in Helidon (critical 9.8)
- [CVE-2026-71164](https://insights.sbomify.com/CVE-2026-71164/): Auth bypass in Helidon (critical 9.8)
- [CVE-2026-73905](https://insights.sbomify.com/CVE-2026-73905/): Auth bypass in Helidon (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-73903 and fix it if it is affected.

What it is: CVE-2026-73903 is a high-severity missing authorization vulnerability in Oracle Helidon, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-73903 in the wild and no public exploit code.

Affected product: Oracle Helidon. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-73903/ (Markdown: https://insights.sbomify.com/CVE-2026-73903/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-73903
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-73903
- OSV: https://osv.dev/vulnerability/CVE-2026-73903

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-73903/
Summaries are generated and may contain mistakes; the official description above is the record.