# CVE-2026-85381: light0011 cms Chapter Controller ChapterController.class.php authorization

> Remote attackers can bypass authorization controls in the Chapter Controller to access restricted content without proper permissions.

- **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:** 4 Sep 2026
- **Updated:** 8 Sep 2026
- **Also known as:** GHSA-g7x4-45c8-wpx3

## What is CVE-2026-85381?

CVE-2026-85381 is a medium-severity missing authorization vulnerability in light0011 cms, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A security vulnerability has been detected in light0011 cms c774dce31c6df0055568a8d5c53d964d99be199d/f72cf46f601efb2a0618c3814cc2f61380b38930. This issue affects some unknown processing of the file App/Home/Controller/ChapterController.class.php of the component Chapter Controller. Such manipulation of the argument content leads to authorization bypass. The attack may be launched remotely. The exploit has been disclosed publicly and may be used. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. 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-2026-85381?


## How do I fix CVE-2026-85381?

No fix has been published for CVE-2026-85381 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-85381 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85381 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-85381 and fix it if it is affected.

What it is: CVE-2026-85381 is a medium-severity missing authorization vulnerability in light0011 cms, published on 4 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-2026-85381 exists.

Affected product: light0011 cms. 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-2026-85381/ (Markdown: https://insights.sbomify.com/CVE-2026-85381/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-85381
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-85381
- OSV: https://osv.dev/vulnerability/CVE-2026-85381

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-85381/
Summaries are generated and may contain mistakes; the official description above is the record.