# CVE-2026-86183: diem-project diem dmWidget BasedmWidgetActions.class.php authorization

> Remote attackers can bypass authorization checks in the diem CMS widget module to access restricted functionality.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Sep 2026
- **Updated:** 11 Sep 2026
- **Also known as:** GHSA-px86-mrrq-wxm3

## What is CVE-2026-86183?

CVE-2026-86183 is a medium-severity missing authorization vulnerability in diem-project diem, published on 6 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was identified in diem-project diem up to 5.1.3. This vulnerability affects unknown code of the file dmFrontPlugin/modules/dmWidget/lib/BasedmWidgetActions.class.php of the component dmWidget. Such manipulation of the argument widget_id leads to authorization bypass. The attack may be launched remotely. The exploit is publicly available and might be used. The name of the patch is 116974edfb9a5b8bd69cb13586dc62bcdbb485ad. A patch should be applied to remediate this issue. The project was informed of the problem early through an issue report but has not responded yet.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-86183?


## How do I fix CVE-2026-86183?

No fix has been published for CVE-2026-86183 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-86183 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-86183 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-86183 and fix it if it is affected.

What it is: CVE-2026-86183 is a medium-severity missing authorization vulnerability in diem-project diem, published on 6 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-86183 exists.

Affected product: diem-project diem. 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-2026-86183/ (Markdown: https://insights.sbomify.com/CVE-2026-86183/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-86183
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-86183
- OSV: https://osv.dev/vulnerability/CVE-2026-86183

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-86183/
Summaries are generated and may contain mistakes; the official description above is the record.