CVE-2026-15789

A custom client can produce such an upload request to the BuildKit daemon that files can escape from the BuildKit-controlled state directory. The client needs to have valid permissions to access the BuildKit control API to issue builds, e.g., bypass authentication, etc.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/moby/buildkit/security/advisories/GHSA-g2h8-426c-7976	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:mobyproject:buildkit:*:*:*:*:*:*:*:*

History

24 Oct 2026, 19:10

Type	Values Removed	Values Added
Summary		(es) Un cliente personalizado puede generar una solicitud de carga de este tipo al demonio de BuildKit que los archivos pueden escapar del directorio de estado controlado por BuildKit. El cliente necesita tener permisos válidos para acceder a la API de control de BuildKit para emitir compilaciones, por ejemplo, omitir la autenticación, etc.

Information

Published : 2026-07-21 17:17

Updated : 2026-10-24 19:10

NVD link : CVE-2026-15789

Mitre link : CVE-2026-15789

CVE.ORG link : CVE-2026-15789

JSON object : View

Products Affected

mobyproject

buildkit

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

{"id": "CVE-2026-15789", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-15789", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-21T17:09:31.474353Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "security@docker.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.9, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security@docker.com", "affectedData": [{"vendor": "moby", "product": "BuildKit", "versions": [{"status": "affected", "version": "0", "lessThan": "0.31.2", "versionType": "semver"}], "platforms": ["Linux", "MacOS", "Windows"], "defaultStatus": "unaffected"}]}], "published": "2026-07-21T17:17:04.843", "references": [{"url": "https://github.com/moby/buildkit/security/advisories/GHSA-g2h8-426c-7976", "tags": ["Vendor Advisory"], "source": "security@docker.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@docker.com", "description": [{"lang": "en", "value": "CWE-22"}]}], "descriptions": [{"lang": "en", "value": "A custom client can produce such an upload request to the BuildKit daemon that files can escape from the BuildKit-controlled state directory. The client needs to have valid permissions to access the BuildKit control API to issue builds, e.g., bypass authentication, etc."}, {"lang": "es", "value": "Un cliente personalizado puede generar una solicitud de carga de este tipo al demonio de BuildKit que los archivos pueden escapar del directorio de estado controlado por BuildKit. El cliente necesita tener permisos v\u00e1lidos para acceder a la API de control de BuildKit para emitir compilaciones, por ejemplo, omitir la autenticaci\u00f3n, etc."}], "lastModified": "2026-10-24T19:10:00.127", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:mobyproject:buildkit:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CD9CB06D-2710-446A-8732-1BD360444B3F", "versionEndExcluding": "0.31.2"}], "operator": "OR"}]}], "sourceIdentifier": "security@docker.com"}