CVE-2026-53840

{"id": "CVE-2026-53840", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53840", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-16T18:51:04.567634Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.2, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.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:L/UI:N/VC:H/VI:L/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": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "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": "disclosure@vulncheck.com", "affectedData": [{"repo": "https://github.com/openclaw/openclaw", "vendor": "OpenClaw", "product": "OpenClaw", "versions": [{"status": "affected", "version": "0", "lessThan": "2026.5.12", "versionType": "semver"}, {"status": "unaffected", "version": "2026.5.12", "versionType": "semver"}], "packageURL": "pkg:npm/openclaw", "defaultStatus": "unaffected"}]}], "published": "2026-06-16T19:17:00.863", "references": [{"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-rjxq-qqhf-8hwh", "tags": ["Vendor Advisory"], "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/openclaw-custom-header-leakage-via-mcp-streamable-http-cross-origin-redirects", "tags": ["Third Party Advisory"], "source": "disclosure@vulncheck.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-522"}]}], "descriptions": [{"lang": "en", "value": "OpenClaw before 2026.5.12 contains an information disclosure vulnerability in streamable-http MCP servers that forwards operator-configured custom headers during cross-origin redirects. Attackers controlling or compromising an MCP endpoint can redirect requests to exfiltrate sensitive headers like API keys or tenant-routing credentials to attacker-controlled origins."}], "lastModified": "2026-06-17T20:31:29.327", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "DE7E74F5-925B-4DC3-AFAF-9C0CAD4AADE9", "versionEndExcluding": "2026.5.12"}, {"criteria": "cpe:2.3:a:openclaw:openclaw:2026.5.12:beta1:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "B2F3E79D-C148-461C-9C28-9CAC44DA9C79"}, {"criteria": "cpe:2.3:a:openclaw:openclaw:2026.5.12:beta2:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "707AED9D-DA43-49D7-B7F4-59A191E84F7F"}, {"criteria": "cpe:2.3:a:openclaw:openclaw:2026.5.12:beta3:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "0A703002-3775-4DD0-AA4A-14A80C966009"}, {"criteria": "cpe:2.3:a:openclaw:openclaw:2026.5.12:beta4:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "A4100ECD-456B-46C7-89A5-ECB2AF5ACAE4"}, {"criteria": "cpe:2.3:a:openclaw:openclaw:2026.5.12:beta5:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "49121842-6A84-4C19-8465-A93C67B2FB32"}, {"criteria": "cpe:2.3:a:openclaw:openclaw:2026.5.12:beta6:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "18698933-5F61-484F-88EB-D14A0C684FF0"}, {"criteria": "cpe:2.3:a:openclaw:openclaw:2026.5.12:beta7:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "471D48FA-A3F4-4DC0-A46D-16FBAAB9A3BD"}, {"criteria": "cpe:2.3:a:openclaw:openclaw:2026.5.12:beta8:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "2543F40A-7360-496F-9F12-38D9B9B9291A"}], "operator": "OR"}]}], "sourceIdentifier": "disclosure@vulncheck.com"}