CVE-2026-56383

Craft CMS - Stored XSS in Table Field via Row Heading Column Type

MEDIUM
4.8
CVSS Score
Published: June 21, 2026 at 01:26 PM UTC
Updated: October 25, 2026 at 11:10 PM UTC
2 products affected across 2 vendorsCMSCraftcms

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.2%
SSVC
PoC

Description

Craft CMS contains a stored cross-site scripting (XSS) vulnerability in the editableTable.twig component when using the 'Row Heading' column type. The application fails to sanitize input within row heading default values, allowing an attacker with an administrator account (with allowAdminChanges enabled) to inject arbitrary JavaScript that executes when another user views a page containing the affected table field. Affected versions are >= 4.5.0-beta.1 through 4.16.18 and >= 5.0.0-RC1 through 5.8.22; fixed in 4.16.19 and 5.8.23.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

95%
4.5.0-beta.1 ≤ v < 4.16.195.0.0-RC1 ≤ v < 5.8.23
Affected range stops below 4.16.19, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.8.23, so it looks safe — our inference, not a vendor statement
4.5.0-beta.1 ≤ v < 4.16.195.0.0-RC1 ≤ v < 5.8.234.5.0-beta.15.0.0-RC1
Vendor states this is fixed in 4.16.19 (unaffected)
Vendor states this is fixed in 5.8.23 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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