Craft Cms
CVE-2026-27126
MEDIUM
GHSA-3jh3-prx3-w6wc
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS 4.8 (MEDIUM). Attack vector: Network. Complexity: Low. Privileges required: High. User interaction: Required. Exploitation requires authentication. |
| Exploit ScenarioDerived | An attacker (requires authentication) could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Stored XSS in Craft CMS 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22 allows high-privileged administrators to inject malicious scripts into HTML-type table columns that execute in other users' browsers. Exploitation requires admin-level access and the allowAdminChanges setting enabled in production, limiting the risk to environments with already-compromised administrative accounts. Patches are available in versions 4.16.19 and 5.8.23.
Earlier versions of this analysis (1)
Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, a stored Cross-site Scripting (XSS) vulnerability exists in the editableTable.twig component when using the html column type. [CVSS 4.8 MEDIUM]
RemediationAI
A vendor patch is available — apply it immediately. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in composer
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Craft Cms. Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, a stored Cross-site Scripting (XSS) vulnerability exists in the editableTable.twig component when using the html column type. The application fails to sanitize the input, allowing an attacker to execute arbitrary JavaScript when another user views a page with the malicious table field. In order to exploit the vulnerability, an attacker must have an administrator account, and `allow
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Severity by source
AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, a stored Cross-site Scripting (XSS) vulnerability exists in the editableTable.twig component when using the html column type. The application fails to sanitize the input, allowing an attacker to execute arbitrary JavaScript when another user views a page with the malicious table field. In order to exploit the vulnerability, an attacker must have an administrator account, and allowAdminChanges must be enabled in production, which is against Craft's security recommendations. Versions 4.16.19 and 5.8.23 patch the issue.
Executive ViewAI
Organizations using versions 4.5.0-RC1 should be aware of moderate risk from CVE-2026-27126, a cross-site scripting vulnerability rated CVSS 4.8. Attackers could inject scripts to steal sessions or perform actions as authenticated users. A patch is available and should be applied during regular vulnerability management.
Apply vendor patch. If patching is delayed: implement CSP headers, enable HttpOnly cookies, deploy WAF XSS rules.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Affected Products (CPE)GitHub Advisory
Craft CMS versions 3.x through 5.x contain a critical remote code execution vulnerability (CVSS 10.0) that allows unauth
Craft CMS stores arbitrary content provided by unauthenticated users in session files. Rated medium severity (CVSS 6.9),
Craft CMS is a platform for creating digital experiences. Rated critical severity (CVSS 9.8), this vulnerability is remo
Craft is a flexible, user-friendly CMS for creating custom digital experiences on the web and beyond. Rated critical sev
Craft CMS up to v3.7.31 was discovered to contain a SQL injection vulnerability via the GraphQL API endpoint. Rated crit
The SEOmatic component before 3.3.0 for Craft CMS allows Server-Side Template Injection that leads to RCE via malformed
RCE in Craft CMS before 4.17.0-beta.1/5.9.0-beta.1 via template injection for authenticated admins. PoC and patch availa
Authenticated remote code execution in Craft CMS versions 5.0.0-RC1 through 5.8.20 and 4.0.0-RC1 through 4.16.16 lets an
SQL injection in Craft CMS 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21 allows authenticated Control Panel use
An issue found in CraftCMS v.3.8.1 allows a remote attacker to execute arbitrary code via a crafted script to the Sectio
Craft CMS through 3.7.36 allows a remote unauthenticated attacker, who knows at least one valid username, to reset the a
Craft CMS 2.6.3000 allows remote attackers to execute arbitrary PHP code by using the "Assets->Upload files" screen and
Exploit-DB