CVE-2026-27129
- Source
- https://cve.org/CVERecord?id=CVE-2026-27129
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27129.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-27129
- Aliases
- Related
- Published
- 2026-02-24T02:45:45.494Z
- Modified
- 2026-07-15T01:49:02.862837777Z
- Severity
-
- 5.7 (Medium) CVSS_V4 - 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 CVSS Calculator
- Summary
- Cloud Metadata SSRF Protection Bypass via IPv6 Resolution
- Details
-
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. - Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27129.json", "cwe_ids": [ "CWE-918" ], "cna_assigner": "GitHub_M" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27129.json
- https://github.com/craftcms/cms/security/advisories/GHSA-v2gc-rm6g-wrw9
- https://github.com/craftcms/cms/security/advisories/GHSA-x27p-wfqw-hfcc
- https://nvd.nist.gov/vuln/detail/CVE-2026-27129
- https://github.com/craftcms/cms/commit/2825388b4f32fb1c9bd709027a1a1fd192d709a3
Affected packages
Git / github.com/craftcms/cms
Affected ranges
- Type
- GIT
- Repo
- https://github.com/craftcms/cms
- Events
- Database specific
{ "cpe": [ "cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*", "cpe:2.3:a:craftcms:craft_cms:5.0.0:-:*:*:*:*:*:*", "cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1:*:*:*:*:*:*" ], "source": [ "CPE_RANGE", "CPE_STRING", "REFERENCES" ], "extracted_events": [ { "introduced": "3.5.0" }, { "fixed": "4.16.19" }, { "introduced": "5.0.1" }, { "fixed": "5.8.23" }, { "introduced": "5.0.0-NA" }, { "last_affected": "5.0.0-NA" }, { "introduced": "5.0.0-rc1" }, { "last_affected": "5.0.0-rc1" } ] }