CVE-2026-54316

{"id": "CVE-2026-54316", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54316", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-23T17:37:32.464559Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.0, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/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": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "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-advisories@github.com", "affectedData": [{"vendor": "anthropics", "product": "claude-code", "versions": [{"status": "affected", "version": ">= 0.2.54, < 2.1.163"}]}]}], "published": "2026-06-23T18:18:08.623", "references": [{"url": "https://github.com/anthropics/claude-code/security/advisories/GHSA-fg94-h982-f3mm", "tags": ["Third Party Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-183"}, {"lang": "en", "value": "CWE-200"}, {"lang": "en", "value": "CWE-515"}]}], "descriptions": [{"lang": "en", "value": "Claude Code is an agentic coding tool. From 0.2.54 until 2.1.163, because the hostname huggingface.co was pre-approved as a bare hostname for the WebFetch tool, any path on that domain\u2014including attacker-controlled model repositories\u2014was auto-approved without a permission prompt or being subject to --allowedTools restrictions. An attacker able to inject untrusted content into a Claude Code context could direct it to issue WebFetch requests against attacker-controlled repository files (e.g. /resolve/main/config.json), which HuggingFace counts as downloads server-side, creating a covert out-of-band channel for encoding and exfiltrating data Claude can access such as files, environment variables, or command output. Reliably exploiting this required the ability to add untrusted content into a Claude Code context window. This vulnerability is fixed in 2.1.163."}, {"lang": "es", "value": "Claude Code es una herramienta de codificaci\u00f3n ag\u00e9ntica. Desde la versi\u00f3n 0.2.54 hasta la 2.1.163, debido a que el nombre de host huggingface.co fue preaprobado como un nombre de host base para la herramienta WebFetch, cualquier ruta en ese dominio -incluidos los repositorios de modelos controlados por el atacante- fue autoaprobada sin una solicitud de permiso o sin estar sujeta a las restricciones de --allowedTools. Un atacante capaz de inyectar contenido no confiable en un contexto de Claude Code podr\u00eda dirigirlo a emitir solicitudes WebFetch contra archivos de repositorio controlados por el atacante (p. ej., /resolve/main/config.json), lo que HuggingFace cuenta como descargas del lado del servidor, creando un canal encubierto fuera de banda para codificar y exfiltrar datos a los que Claude puede acceder, como archivos, variables de entorno o la salida de comandos. Explotar esto de forma fiable requer\u00eda la capacidad de a\u00f1adir contenido no confiable en una ventana de contexto de Claude Code. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 2.1.163."}], "lastModified": "2026-10-25T23:10:00.167", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:anthropic:claude_code:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "D5FF7E48-C79D-4F3C-867E-8827FA465A1C", "versionEndExcluding": "2.1.163", "versionStartIncluding": "0.2.54"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}