# CVE-2026-18527: Auth bypass in Administration Runtime Expert for i

> An unauthenticated attacker can exploit the ARE GUI component to execute actions under another user's profile, gaining elevated privileges and accessing sensitive information.

- **Severity:** Critical 9.9 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Aug 2026
- **Updated:** 31 Aug 2026
- **Also known as:** GHSA-rg54-x42p-hp27

## What is CVE-2026-18527?

CVE-2026-18527 is a critical authentication bypass vulnerability in IBM Administration Runtime Expert for i, published on 28 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

IBM Administration Runtime Expert for i 1R1M0 IBM Application Runtime Expert (ARE) for i could allow a remote attacker to gain elevated privileges, caused by ARE GUI component processing. An unauthenticated attacker can exploit this vulnerability to execute actions under another user's authenticated profile gaining elevated privileges on the IBM i system.

Weakness: CWE-384 (Session Fixation)

## Which versions are affected by CVE-2026-18527?


## How do I fix CVE-2026-18527?

No fix has been published for CVE-2026-18527 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-18527 being exploited?

There is no known exploitation of CVE-2026-18527 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18527 and fix it if it is affected.

What it is: CVE-2026-18527 is a critical authentication bypass vulnerability in IBM Administration Runtime Expert for i, published on 28 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-18527 in the wild and no public exploit code.

Affected product: IBM Administration Runtime Expert for i. 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-2026-18527/ (Markdown: https://insights.sbomify.com/CVE-2026-18527/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18527
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18527
- OSV: https://osv.dev/vulnerability/CVE-2026-18527

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-18527/
Summaries are generated and may contain mistakes; the official description above is the record.