Medium 5.7Published Feb 23, 2026

CVE-2026-27129Cloud Metadata SSRF Protection Bypass via IPv6 Resolution

Updated under an hour ago (Oct 26, 2026, 1:40 PM ET)

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It affects craftcms cms and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for craftcms cms

Exploited in the last 30 days

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: 5.7 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

craftcms cms craftcms:cms (from the name)	from 4.5.0-RC1, < 4.16.19; from 5.0.0-RC1, < 5.8.23	CNA record
craftcms craft_cms craftcms:craft_cms	from 3.5.0 before 4.16.19; from 5.0.1 before 5.8.23; 5.0.0; 5.0.0	NVD

References

References

https://github.com/craftcms/cms/security/advisories/GHSA-v2gc-rm6g-wrw9	x-refsource-confirm, exploit, mitigation, patch, vendor-advisory
https://github.com/craftcms/cms/security/advisories/GHSA-x27p-wfqw-hfcc	x-refsource-misc, not-applicable
https://github.com/craftcms/cms/commit/2825388b4f32fb1c9bd709027a1a1fd192d709a3	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.