CVE-2026-27127
Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding
Description
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.
INFO
Published Date :
Feb. 24, 2026, 3:16 a.m.
Last Modified :
Feb. 25, 2026, 7:31 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Craft CMS to version 4.16.19 or later.
- Update Craft CMS to version 5.8.23 or later.
- Review and restrict GraphQL schema permissions for asset editing.
- Ensure Public Schema does not have write permissions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-27127.
| URL | Resource |
|---|---|
| https://github.com/craftcms/cms/commit/a4cf3fb63bba3249cf1e2882b18a2d29e77a8575 | Patch |
| https://github.com/craftcms/cms/security/advisories/GHSA-gp2f-7wcm-5fhx | Exploit Mitigation Vendor Advisory |
| https://github.com/craftcms/cms/security/advisories/GHSA-x27p-wfqw-hfcc | Exploit Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-27127 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-27127
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-27127 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-27127 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 25, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1:*:*:*:*:*:* *cpe:2.3:a:craftcms:craft_cms:5.0.0:-:*:*:*:*:*:* *cpe:2.3:a:craftcms:craft_cms:3.5.0:-:*:*:*:*:*:* *cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* versions from (including) 3.5.1 up to (excluding) 4.16.19 *cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* versions from (including) 5.0.1 up to (excluding) 5.8.23 Added Reference Type GitHub, Inc.: https://github.com/craftcms/cms/commit/a4cf3fb63bba3249cf1e2882b18a2d29e77a8575 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/craftcms/cms/security/advisories/GHSA-gp2f-7wcm-5fhx Types: Exploit, Mitigation, Vendor Advisory Added Reference Type GitHub, Inc.: https://github.com/craftcms/cms/security/advisories/GHSA-x27p-wfqw-hfcc Types: Exploit, Patch, Vendor Advisory -
New CVE Received by [email protected]
Feb. 24, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/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 Added CWE CWE-367 Added Reference https://github.com/craftcms/cms/commit/a4cf3fb63bba3249cf1e2882b18a2d29e77a8575 Added Reference https://github.com/craftcms/cms/security/advisories/GHSA-gp2f-7wcm-5fhx Added Reference https://github.com/craftcms/cms/security/advisories/GHSA-x27p-wfqw-hfcc