CVE-2026-24052

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{"affected": [{"affectedData": [{"product": "claude-code", "vendor": "anthropics", "versions": [{"status": "affected", "version": "< 1.0.111"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:anthropic:claude_code:*:*:*:*:*:node.js:*:*", "matchCriteriaId": "F3228CCD-772D-459F-ACFD-0230FD8AB721", "versionEndExcluding": "1.0.111", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Claude Code is an agentic coding tool. Prior to version 1.0.111, Claude Code contained insufficient URL validation in its trusted domain verification mechanism for WebFetch requests. The application used a startsWith() function to validate trusted domains (e.g., docs.python.org, modelcontextprotocol.io), this could have enabled attackers to register domains like modelcontextprotocol.io.example.com that would pass validation. This could enable automatic requests to attacker-controlled domains without user consent, potentially leading to data exfiltration. This issue has been patched in version 1.0.111."}, {"lang": "es", "value": "Claude Code es una herramienta de codificaci\u00f3n ag\u00e9ntica. Antes de la versi\u00f3n 1.0.111, Claude Code conten\u00eda una validaci\u00f3n de URL insuficiente en su mecanismo de verificaci\u00f3n de dominio de confianza para solicitudes WebFetch. La aplicaci\u00f3n utilizaba una funci\u00f3n startsWith() para validar dominios de confianza (p. ej., docs.python.org, modelcontextprotocol.io), esto podr\u00eda haber permitido a los atacantes registrar dominios como modelcontextprotocol.io.example.com que pasar\u00edan la validaci\u00f3n. Esto podr\u00eda permitir solicitudes autom\u00e1ticas a dominios controlados por el atacante sin el consentimiento del usuario, lo que podr\u00eda llevar a la exfiltraci\u00f3n de datos. Este problema ha sido parcheado en la versi\u00f3n 1.0.111."}], "id": "CVE-2026-24052", "lastModified": "2026-06-17T10:22:31.613", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.0, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/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", "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-2026-24052", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-04T20:00:03.072035Z", "version": "2.0.3"}}]}, "published": "2026-02-03T21:16:13.073", "references": [{"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/anthropics/claude-code/security/advisories/GHSA-vhw5-3g5m-8ggf"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-601"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T00:04:03.078236+00:00", "value": {"mitigation_remediation": ["Upgrade Claude Code to version 1.0.111 or later to apply the formal fix.", "After upgrading, audit outbound traffic from Claude Code for unexpected connections to external domains.", "If the upgrade cannot be performed immediately, disable or restrict the WebFetch feature, or modify the trusted domain list to include only exact matches."], "summary": {"action": "Immediate Patch", "impact": "Unauthorized external requests enabling data exfiltration"}, "threat_synthesis": {"affected_systems": "Anthropic\u2019s Claude Code product, versions earlier than 1.0.111, are affected. The vulnerability exists in all binaries that perform WebFetch requests before the patched version.", "description_and_impact": "Claude Code, prior to version 1.0.111, relied on startsWith() logic to validate trusted domains for WebFetch requests. This allowed attackers to register domains that prefixed a legitimate domain (e.g. modelcontextprotocol.io.example.com), causing the tool to treat them as trusted and automatically send WebFetch requests to them without user consent. Such automatic outbound calls could lead to data exfiltration or malicious payload delivery, representing a significant confidentiality risk.", "risk_and_exploitability": "The flaw carries a CVSS Score of 7.1, categorizing it as high impact, yet the EPSS score is below 1\u202f%, indicating a low probability of active exploitation. The vulnerability is not listed in CISA\u2019s KEV catalog. Exploitation requires the attacker to trigger a WebFetch request from within the tool, so ordinary users are not directly exposed, but an attacker who can manipulate the tool or its inputs can force automatic traffic to attacker\u2011controlled domains. Given the potential for data leakage, the risk remains significant despite the low exploitation probability."}}}}, "created": "2026-02-04T12:05:33.669376+00:00", "updated": "2026-04-18T00:15:31.773217+00:00", "vendors": ["anthropics", "anthropics$PRODUCT$claude_code"]}