CVE-2026-27127: Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding

high Affects craftcms/cms. Feed 2026.10.29.1, updated 2026-10-28; published 2026-02-23; advisory modified 2026-02-28.

Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding

Package: craftcms/cms Composer
Affected versions: >=5.0.0-RC1 and <5.8.23 or >=3.5.0 and <4.16.19
Fixed in: 5.8.23, 4.16.19
Severity: high
Exploitation: not on CISA KEV · EPSS 0% (41.8th percentile)
Published: 2026-02-23
Source: osv.dev

References

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