Read the docs
TI-2026-40753 Aliases CVE-2026-56393GHSA-4mgv-366x-qxvx

Craft CMS - Multiple Stored Cross-Site Scripting in Settings Names and Field Options

Priority MEDIUM 54CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

Craft CMS 4.x (>= 4.0.0-RC1, < 4.17.0-beta.1) and 5.x (>= 5.0.0-RC1, < 5.9.0-beta.1) contain multiple stored cross-site scripting vulnerabilities where settings names and field option labels are rendered without sanitization (e.g., via the checkbox.twig template, which used {{ label|raw }}). An authenticated administrator (with allowAdminChanges enabled) can inject malicious payloads into section names, volume names, user group names, global set names, generated field names, checkbox/radio option labels, and custom source labels, causing arbitrary JavaScript to execute in other users' control-panel sessions. Fixed in 4.17.0-beta.1 and 5.9.0-beta.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00225 13th percentileScored 2026-11-07
Fix Fixed cms (craftcms): 5.9.0-beta.1, 4.17.0-beta.1craftcms/cms (Packagist): 5.9.0-beta.1, 4.17.0-beta.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Craft CMScms5.0.0-RC1 to before 5.9.0-beta.1; 4.0.0-RC1 to before 4.17.0-beta.15.9.0-beta.1, 4.17.0-beta.1Patch availableCNA
—craftcms/cms (Packagist)5.0.0-RC1 to before 5.9.0-beta.15.9.0-beta.1Patch availableGHSA-4mgv-366x-qxvx
—craftcms/cms (Packagist)4.0.0-RC1 to before 4.17.0-beta.14.17.0-beta.1Patch availableGHSA-4mgv-366x-qxvx
  • cms VendorCraft CMS Affected 5.0.0-RC1 to before 5.9.0-beta.1; 4.0.0-RC1 to before 4.17.0-beta.1 Fixed in 5.9.0-beta.1, 4.17.0-beta.1 Patch available CNA
  • craftcms/cms (Packagist) Vendor— Affected 5.0.0-RC1 to before 5.9.0-beta.1 Fixed in 5.9.0-beta.1 Patch available GHSA-4mgv-366x-qxvx
  • craftcms/cms (Packagist) Vendor— Affected 4.0.0-RC1 to before 4.17.0-beta.1 Fixed in 4.17.0-beta.1 Patch available GHSA-4mgv-366x-qxvx

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*——Craft CMS
  • cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* Versions — — ·Craft CMS

Remediation

  • Fix · CNA cms (craftcms) Fixed in 5.9.0-beta.1, 4.17.0-beta.1
  • Fix · GHSA-4mgv-366x-qxvx craftcms/cms (Packagist) Fixed in 5.9.0-beta.1 Advisory →
  • Fix · GHSA-4mgv-366x-qxvx craftcms/cms (Packagist) Fixed in 4.17.0-beta.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-56393
  2. 2026-10-03 Alias added: GHSA-4mgv-366x-qxvx

References

Patch 2

Advisory 2

Other 1

  • TI-2025-23503 Craft CMS Allows Remote Code Execution KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-37138 RCE when PHP `register_argc_argv` config setting is enabled in craftcms/cms KEVCVSS 4.0CRITICAL 9.3
  • TI-2025-16994 Potential RCE with a compromised security key in craft/cms KEVCVSS 3.1HIGH 8.1
  • TI-2025-24595 Craft CMS stores user-provided content in session files KEVCVSS 4.0MEDIUM 6.9
  • TI-2023-22284 Craft CMS Remote Code Execution vulnerability CVSS 3.1CRITICAL 10.0
  • TI-2024-25171 Craft CMS up to v3.7.31 was discovered to contain a SQL injection vulnerability via the GraphQL API endpoint. CVSS 3.1CRITICAL 9.8
See all 203 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences