Craft Cms
CVE-2026-27127
MEDIUM
GHSA-gp2f-7wcm-5fhx
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A04:2021 - Insecure Design
ASVS 5.0
V15 - Secure Coding and Architecture TOCTOU prevention
|
| Impact | CVSS 6.3 (MEDIUM). Attack vector: Network. Complexity: High. Privileges required: Low. User interaction: None. Exploitation requires authentication. Public exploit/POC available. |
| Exploit ScenarioDerived | An attacker (requires authentication) could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
DNS rebinding attacks in Craft CMS 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22 allow authenticated attackers to bypass SSRF protections in GraphQL asset mutations by exploiting a Time-of-Check-Time-of-Use race condition between DNS validation and HTTP requests. Attackers with appropriate GraphQL schema permissions can access blocked IP addresses and internal resources that should be restricted. Public exploit code exists for this vulnerability, which represents a bypass of the previous CVE-2025-68437 fix.
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, the SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. [CVSS 6.3 MEDIUM]
RemediationAI
A vendor patch is available — apply it immediately. 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
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, the SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use (TOCTOU) vulnerability enables DNS rebinding attacks, where an attacker’s DNS server returns different IP addresses for validation compared to the actual request. This is a bypass of the security fix for CVE-2025-68437 that allows access to
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
3DescriptionGitHub 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, the SSRF validation in Craft CMS’s GraphQL Asset mutation performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use (TOCTOU) vulnerability enables DNS rebinding attacks, where an attacker’s DNS server returns different IP addresses for validation compared to the actual request. This is a bypass of the security fix for CVE-2025-68437 that allows access to all blocked IPs, not just IPv6 endpoints. Exploitation requires GraphQL schema permissions for editing assets in the <VolumeName> volume and creating assets in the <VolumeName> volume. These permissions may be granted to authenticated users with appropriate GraphQL schema access and/or Public Schema (if misconfigured with write permissions). 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-2026-27127 rated CVSS 6.3. Exploitation could compromise the security of affected deployments. Proof-of-concept code is publicly available. A patch is available and should be applied during regular vulnerability management.
Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.
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
Server-Side Request Forgery exploits applications that fetch remote resources based on user-supplied URLs.
Race conditions occur when multiple concurrent requests exploit the brief time gap between checking a condition and acting upon it (TOCTOU - Time of Check, Time of Use).
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