CVE-2026-27129

MEDIUM EPSS 33.8%
Published Feb 24, 20264mo ago · Modified Jun 17, 20261w ago
5.7 CVSS 4.0
Medium
Find Similar
Published Feb 24, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

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 uses `gethostbyname()`, which only resolves IPv4 addresses. When a hostname has only AAAA (IPv6) records, the function returns the hostname string itself, causing the blocklist comparison to always fail and completely bypassing SSRF protection. This is a bypass of the security fix for CVE-2025-68437. 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.

CVSS Details

Base Score
5.7
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/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 Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
33.8% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-918 Server-Side Request Forgery (SSRF) Validation

Affected Products 4

VendorProductVersionRange
craftcmscraft_cms*≥3.5.0  –  <4.16.19
craftcmscraft_cms*≥5.0.1  –  <5.8.23
craftcmscraft_cms5.0.0any
craftcmscraft_cms5.0.0any

References 3

  • github.com https://github.com/craftcms/cms/commit/2825388b4f32fb1c9bd709027a1a1fd192d709a3
    Patch
  • github.com https://github.com/craftcms/cms/security/advisories/GHSA-v2gc-rm6g-wrw9
    ExploitMitigationPatchVendor Advisory
  • github.com https://github.com/craftcms/cms/security/advisories/GHSA-x27p-wfqw-hfcc
    Not Applicable

Remediation

  • github.com https://github.com/craftcms/cms/commit/2825388b4f32fb1c9bd709027a1a1fd192d709a3
    Patch
  • github.com https://github.com/craftcms/cms/security/advisories/GHSA-v2gc-rm6g-wrw9
    ExploitMitigationPatchVendor Advisory