# CVE-2026-44012: Craft CMS: Missing Volume Permission Check in AssetsController::actionShowInFolder Allows Information Disclosure

> Authenticated users can bypass volume permissions to enumerate asset filenames and folder structures in Craft CMS.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 12 May 2026
- **Updated:** 13 May 2026
- **Also known as:** GHSA-33m5-hqp9-97pw

## What is CVE-2026-44012?

CVE-2026-44012 is a high-severity missing authorization vulnerability in craftcms cms, published on 12 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Craft CMS is a content management system (CMS). From 5.0.0-RC1 to before 5.9.18, AssetsController::actionShowInFolder() fetches an asset by ID and returns its filename and complete folder hierarchy (including volume handle, volume UID, folder names, folder UIDs, and folder URI paths) without checking whether the requesting user has viewAssets or viewPeerAssets permission on the asset’s volume. Any authenticated CP user — even one with zero volume permissions — can enumerate asset filenames and the full folder structure of any volume by supplying arbitrary asset IDs. This vulnerability is fixed in 5.9.18.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-44012?

2 open source packages ship an affected version, including craftcms/cms.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `craftcms/cms` | Packagist | From 5.0.0-RC1 | 5.9.18 |
| `craftcms/cms` | Packagist | From 5.0.0-RC1 | 5.9.18 |

## How do I fix CVE-2026-44012?

Upgrade craftcms/cms to 5.9.18 or later.

## Is CVE-2026-44012 being exploited?

There is no known exploitation of CVE-2026-44012 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-44012 and fix it if it is affected.

What it is: CVE-2026-44012 is a high-severity missing authorization vulnerability in craftcms cms, published on 12 May 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-2026-44012 in the wild and no public exploit code.

Affected packages and fixed versions:
- craftcms/cms (Packagist): affected from 5.0.0-RC1; fixed in 5.9.18
- craftcms/cms (Packagist): affected from 5.0.0-RC1; fixed in 5.9.18

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-2026-44012/ (Markdown: https://insights.sbomify.com/CVE-2026-44012/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-44012
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-44012
- OSV: https://osv.dev/vulnerability/CVE-2026-44012

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-44012/
Summaries are generated and may contain mistakes; the official description above is the record.