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Craft CMS vulnerable to behavior injection RCE ElementIndexesController and FieldsControllerGHSA-4484-8v2f-5748

Fix: craftcms/cms@78d181e

GHSA-4484-8v2f-5748 is a CWE-470 vulnerability in craftcms/cms. A fix is available for craftcms/cms — see the affected versions and patch details below.

Also known asCVE-2026-32264
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • A successful exploit gives an attacker total control of the affected component, not partial access.
  • 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 GHSA-4484-8v2f-5748.

EPSS Exploitation Probability

via FIRST.org ↗
0.5%probability of exploitation in next 30 days
Lower Risk+0.01%
Lower risk than most CVEs46th percentile — riskier than 46% of all scored CVEsHighest risk
0.00%0.39%0.78%1.18%0.0%0.5%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

2 pkgs affected
🐘craftcms/cms🐘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

The fix for https://github.com/advisories/GHSA-7jx7-3846-m7w7 (commit https://github.com/craftcms/cms/commit/395c64f0b80b507be1c862a2ec942eaacb353748) only patched src/services/Fields.php, but the same vulnerable pattern exists in ElementIndexesController and FieldsController.

You need Craft control panel administrator permissions, and allowAdminChanges must be enabled for this to work.

An attacker can use the same gadget chain from the original advisory to achieve RCE.

Users should update to Craft 4.17.5 and 5.9.11 to mitigate the issue.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistcraftcms/cms≥ 4.0.0-RC1&&< 4.17.54.17.5composer require craftcms/cms:^4.17.5
🐘Packagistcraftcms/cms≥ 5.0.0-RC1&&< 5.9.115.9.11composer require craftcms/cms:^5.9.11

Affected Products

1 product · 8 configurations
Application
craft cmscraftcms
≥ 5.0.1 && < 5.9.11
2 versions
4.0.05.0.0

Detection & mitigation playbook

Open-source dependency

  1. 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.

  2. Fix

    Update craftcms/cms to 4.17.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-4484-8v2f-5748 is resolved across your whole dependency graph.

  3. 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.

Frequently Asked Questions

The fix for https://github.com/advisories/GHSA-7jx7-3846-m7w7 (commit https://github.com/craftcms/cms/commit/395c64f0b80b507be1c862a2ec942eaacb353748) only patched `src/services/Fields.php`, but the same vulnerable pattern exists in `ElementIndexesController` and `FieldsController`. You need Craft control panel administrator permissions, and allowAdminChanges must be enabled for this to work. An attacker can use the same gadget chain from the original advisory to achieve RCE. Users should update to Craft 4.17.5 and 5.9.11 to mitigate the issue.
O3 Security · Impact-Aware SCA

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Craft CMS vulnerable to behavior injection RCE…