CVE-2026-27127 (GCVE-0-2026-27127)
Vulnerability from cvelistv5 – Published: 2026-02-24 02:39 – Updated: 2026-02-24 02:39
VLAI?
Title
Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding
Summary
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 performs DNS resolution separately from the HTTP request. This Time-of-Check-Time-of-Use (TOCTOU) vulnerability enables DNS rebinding attacks, where an attacker’s DNS server returns different IP addresses for validation compared to the actual request. This is a bypass of the security fix for CVE-2025-68437 that allows access to all blocked IPs, not just IPv6 endpoints. 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.
Severity ?
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
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Impacted products
{
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{
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"vendor": "craftcms",
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"version": "\u003e= 4.5.0-RC1, \u003c 4.16.19"
},
{
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}
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"version": "4.0",
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"tags": [
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"url": "https://github.com/craftcms/cms/commit/a4cf3fb63bba3249cf1e2882b18a2d29e77a8575"
}
],
"source": {
"advisory": "GHSA-gp2f-7wcm-5fhx",
"discovery": "UNKNOWN"
},
"title": "Craft CMS has Cloud Metadata SSRF Protection Bypass via DNS Rebinding"
}
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"dateReserved": "2026-02-17T18:42:27.043Z",
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La explotaci\u00f3n requiere permisos de esquema GraphQL para editar activos en el volumen `` y crear activos en el volumen ``. Estos permisos pueden ser otorgados a usuarios autenticados con acceso apropiado al esquema GraphQL y/o Esquema P\u00fablico (si est\u00e1 mal configurado con permisos de escritura). 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}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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