CVE-2026-27129: medium-severity vulnerability in craftcms cms
Cloud Metadata SSRF Protection Bypass via IPv6 Resolution
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.7epss 0.5%
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: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
Affected products
craftcms · cmsRelated CVEs — craftcms cms
In the same product, most dangerous first.
CVE-2025-32432CRITICALCraft CMS Allows Remote Code ExecutionEPSS 99.8%KEVCVE-2024-56145CRITICALRCE when PHP `register_argc_argv` config setting is enabled in craftcms/cmsEPSS 97.5%KEVCVE-2025-23209HIGHPotential RCE with a compromised security key in craft/cmsEPSS 21.6%KEVCVE-2023-41892CRITICALCraft CMS Remote Code Execution vulnerabilityEPSS 94.2%CVE-2026-32267HIGHCraft CMS Vulnerable to Privilege Escalation/Bypass through UsersController->actionImpersonateWithToken()EPSS 9.6%CVE-2023-40035HIGHCraft CMS vulnerable to Remote Code Execution via validatePath bypassEPSS 2.3%