How severe is CVE-2026-44012?

No CVSS score has been assigned to CVE-2026-44012 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-44012?

CVE-2026-44012 affects the following packages: craftcms/cms (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2026-44012?

Update craftcms/cms to 5.9.18 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-44012 is resolved across your whole dependency graph.

How do I detect CVE-2026-44012 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for craftcms/cms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-44012 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2026-44012?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-44012 can be triaged on real exposure rather than presence alone.

Is CVE-2026-44012 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-44012 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-44012?

CVE-2026-44012 has an EPSS (Exploit Prediction Scoring System) score of 0.3%, placing it in the 27th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-44012?

CVE-2026-44012 is classified as CWE-862 (CWE-862). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-44012 published, and has it been updated?

CVE-2026-44012 was published on May 12, 2026 and was last updated on August 12, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

CVE-2026-44012 — craftcms/cms

Fix: craftcms/cms@e3f3eaa

CVE-2026-44012 is a CWE-862 vulnerability in craftcms/cms. A fix is available for craftcms/cms — see the affected versions and patch details below.

Craft CMS: Missing Volume Permission Check in AssetsController::actionShowInFolder Allows Information Disclosure

Also known asGHSA-33m5-hqp9-97pw

Published

May 12, 2026

Updated

Aug 12, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Sep 22, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-44012.

EPSS Exploitation Probability

via FIRST.org ↗

0.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs27th percentile — riskier than 27% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Real-World Exposure

1 pkg affected

🐘craftcms/cms

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Summary

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 follows the exact same incomplete-patch pattern as four GHSAs merged on 2026-02-25 (GHSA-x76w-8c62-48mg, GHSA-vgjg-248p-rfm2, GHSA-5pgf-h923-m958, GHSA-3pvf-vxrv-hh9c), all of which added requireVolumePermissionByAsset() + requirePeerVolumePermissionByAsset() to sibling AssetsController actions. The actionShowInFolder method was introduced thirteen days before the patch wave and was not included in it.

Details

The vulnerability is in src/controllers/AssetsController.php at line 1437. The method:

Calls requireCpRequest() — verifies the request targets the CP, enforces accessCp permission via Controller::_enforceAllowAnonymous(), but does NOT enforce any volume-level permission.
Fetches any asset by ID with Asset::findOne($assetId) — no editable/savable scope filter, so all assets across all volumes are reachable.
Returns sensitive structural data via JSON.

Impact

Any authenticated control panel user with only accessCp permission can discover the filenames and complete folder structure (names, UIDs, handles, URIs) of assets in volumes they are not authorized to access.
Sensitive volume structures — private document repositories, confidential media, internal file names — are exposed to any user who can log into the control panel.
This enables targeted follow-up attacks: an attacker who knows a private asset’s filename and folder path may have other avenues to exfiltrate the actual file.

Resources

https://github.com/craftcms/cms/commit/e3f3eaab3d85badd713cfc2c24e5f0792ecdb586

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`craftcms/cms`	≥ 5.0.0-RC1&&< 5.9.18	5.9.18`composer require craftcms/cms:^5.9.18`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for craftcms/cms, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update craftcms/cms to 5.9.18 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-44012 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-44012 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2026-44012. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

## Summary `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 follows the exact same incomplete-patch pattern as four GHSAs merged on 2026-02-25 (

O3 Security · Impact-Aware SCA

Is CVE-2026-44012 in your dependencies?

O3 Security finds CVE-2026-44012 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works