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Craft CMS EUVDEUVD-2026-56109

| CVE-2026-72785 CRITICAL
Incorrect Authorization (CWE-863)
2026-08-11 VulnCheck GHSA-4hc4-qjfx-wjf3
Authentication Bypass Cms
9.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
9.3 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
4.3 MEDIUM

Requires an authenticated low-privilege CP user (PR:L) over the web (AV:N), trivially (AC:L); no confidentiality or RCE, and integrity impact is confined to category taxonomy (C:N/I:L/A:N).

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
Patch available
Aug 11, 2026 - 13:17 EUVD
Source Code Evidence Fetched
Aug 11, 2026 - 13:05 vuln.today
Analysis Generated
Aug 11, 2026 - 13:05 vuln.today
CVE Published
Aug 11, 2026 - 12:17 cve.org
CRITICAL 9.3

DescriptionCVE.org

Craft CMS 5.0.0-RC1 through 5.10.5 contains an incorrect authorization vulnerability. A control-panel user holding only the viewCategories permission (without saveCategories) for a category group can permanently modify that group's category structure - reordering and re-parenting categories - via the structures/move-element action. The structureEditable flag is computed from the view permission rather than the save permission, and the StructuresController authorizes the mutating action on that read-time session grant without a save re-check. Because a category's URI is derived from its position in the structure, moving a category changes its URL and those of its descendants and can corrupt navigation menus built from the category taxonomy. The issue is fixed in 5.10.6.

AnalysisAI

Broken access control in Craft CMS 5.0.0-RC1 through 5.10.5 lets a control-panel user holding only the viewCategories permission permanently reorder and re-parent categories through the structures/move-element action, despite lacking saveCategories. Because category URIs are derived from structure position, an attacker can silently change category URLs and those of all descendants and corrupt taxonomy-driven navigation menus. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate to control panel as view-only category user
Delivery
Open read-only category index to obtain editStructure session grant
Exploit
Send structures/move-element request
Execution
Re-parent or reorder categories
Persist
Rewrite category and descendant URIs
Impact
Corrupt site navigation and links
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Vulnerability AssessmentAI

Exploitation Requires an authenticated Craft CMS control-panel account that holds the viewCategories permission for at least one category group but NOT saveCategories - this exact permission combination is the prerequisite, and the mutating request must target the structures/move-element action. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The signals conflict and must be reconciled. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A disgruntled junior editor granted only view access to a product-category group opens the category index, then issues a structures/move-element request to re-parent a top-level category under another node. The taxonomy silently reorders, rewriting the URIs of that category and all its children, breaking existing links and corrupting the site's navigation menus. …
Remediation Vendor-released patch: upgrade Craft CMS to 5.10.6 or later (composer require craftcms/cms:^5.10.6 followed by php craft up), which adds the missing save-permission re-check; the fix is in commit eb63721b8476ef53f21d7de53d156eef531cb57d. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify all Craft CMS instances running versions 5.0.0-RC1 through 5.10.5 and restrict control-panel access to trusted administrators only. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-56109 vulnerability details – vuln.today
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