FKIE_CVE-2026-27127
Vulnerability from fkie_nvd - Published: 2026-02-24 03:16 - Updated: 2026-06-17 10:26
Severity
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.
References
| URL | Tags | ||
|---|---|---|---|
| security-advisories@github.com | https://github.com/craftcms/cms/commit/a4cf3fb63bba3249cf1e2882b18a2d29e77a8575 | Patch | |
| security-advisories@github.com | https://github.com/craftcms/cms/security/advisories/GHSA-gp2f-7wcm-5fhx | Exploit, Mitigation, Vendor Advisory | |
| security-advisories@github.com | https://github.com/craftcms/cms/security/advisories/GHSA-x27p-wfqw-hfcc | Exploit, Patch, Vendor Advisory |
{
"affected": [
{
"affectedData": [
{
"product": "cms",
"vendor": "craftcms",
"versions": [
{
"status": "affected",
"version": "\u003e= 4.5.0-RC1, \u003c 4.16.19"
},
{
"status": "affected",
"version": "\u003e= 5.0.0-RC1, \u003c 5.8.23"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*",
"matchCriteriaId": "A5375BC8-3E29-48A4-AE56-1B544F736CFA",
"versionEndExcluding": "4.16.19",
"versionStartIncluding": "3.5.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*",
"matchCriteriaId": "6DF22B83-BC96-49B9-9694-F6F2688409AA",
"versionEndExcluding": "5.8.23",
"versionStartIncluding": "5.0.1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:craftcms:craft_cms:3.5.0:-:*:*:*:*:*:*",
"matchCriteriaId": "6DBDF2E4-0F24-4B10-8FF1-83C2F67A45D4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:craftcms:craft_cms:5.0.0:-:*:*:*:*:*:*",
"matchCriteriaId": "1C7461CF-35AB-48E1-88B6-956DAE1D2AB4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1:*:*:*:*:*:*",
"matchCriteriaId": "8D8E02D1-601A-4E2B-B619-4775BFDB72D0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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\u2019s 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\u2019s 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 `\u003cVolumeName\u003e` volume and creating assets in the `\u003cVolumeName\u003e` 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."
},
{
"lang": "es",
"value": "Craft es un sistema de gesti\u00f3n de contenido (CMS). En las versiones 4.5.0-RC1 hasta la 4.16.18 y 5.0.0-RC1 hasta la 5.8.22, la validaci\u00f3n de SSRF en la mutaci\u00f3n GraphQL Asset de Craft CMS realiza la resoluci\u00f3n DNS separadamente de la solicitud HTTP. Esta vulnerabilidad de Tiempo de Verificaci\u00f3n-Tiempo de Uso (TOCTOU) permite ataques de reencuadernaci\u00f3n de DNS, donde el servidor DNS de un atacante devuelve diferentes direcciones IP para la validaci\u00f3n en comparaci\u00f3n con la solicitud real. Esto es un bypass de la correcci\u00f3n de seguridad para CVE-2025-68437 que permite el acceso a todas las IP bloqueadas, no solo a los puntos finales IPv6. 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). Las versiones 4.16.19 y 5.8.23 parchean el problema."
}
],
"id": "CVE-2026-27127",
"lastModified": "2026-06-17T10:26:42.897",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 4.0,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "HIGH",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "security-advisories@github.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-27127",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-28T02:12:07.793660Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-02-24T03:16:02.440",
"references": [
{
"source": "security-advisories@github.com",
"tags": [
"Patch"
],
"url": "https://github.com/craftcms/cms/commit/a4cf3fb63bba3249cf1e2882b18a2d29e77a8575"
},
{
"source": "security-advisories@github.com",
"tags": [
"Exploit",
"Mitigation",
"Vendor Advisory"
],
"url": "https://github.com/craftcms/cms/security/advisories/GHSA-gp2f-7wcm-5fhx"
},
{
"source": "security-advisories@github.com",
"tags": [
"Exploit",
"Patch",
"Vendor Advisory"
],
"url": "https://github.com/craftcms/cms/security/advisories/GHSA-x27p-wfqw-hfcc"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-367"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.