{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-41376", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-04-20T14:10:32.653Z", "datePublished": "2026-04-28T18:09:39.883Z", "dateUpdated": "2026-04-28T18:09:39.883Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-04-28T18:09:39.883Z"}, "title": "OpenClaw < 2026.3.31 - Matrix Thread Context Allowlist Bypass via Sender Validation", "descriptions": [{"lang": "en", "value": "OpenClaw before 2026.3.31 contains an allowlist bypass vulnerability in Matrix thread root and reply context handling that fails to properly validate message senders. Attackers can fetch thread-root and reply context messages that should be filtered by sender allowlists, bypassing access controls."}], "tags": ["x_open-source"], "datePublic": "2026-03-31T00:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-346", "description": "CWE-346: Origin Validation Error", "type": "CWE"}]}], "affected": [{"vendor": "OpenClaw", "product": "OpenClaw", "defaultStatus": "unaffected", "packageURL": "pkg:npm/openclaw", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "2026.3.31"}, {"version": "2026.3.31", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "2026.3.31"}]}]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "LOW", "baseScore": 2.3, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE", "version": "3.1", "baseSeverity": "MEDIUM", "baseScore": 5.4, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"}}], "references": [{"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-rg8m-3943-vm6q", "name": "GitHub Security Advisory (GHSA-rg8m-3943-vm6q)", "tags": ["vendor-advisory"]}, {"url": "https://github.com/openclaw/openclaw/commit/8a563d603b70ef6338915f0527bee87282c3bad5", "name": "Patch Commit", "tags": ["patch"]}, {"name": "VulnCheck Advisory: OpenClaw < 2026.3.31 - Matrix Thread Context Allowlist Bypass via Sender Validation", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/openclaw-matrix-thread-context-allowlist-bypass-via-sender-validation"}], "credits": [{"lang": "en", "value": "AntAISecurityLab", "type": "reporter"}], "x_generator": {"engine": "vulncheck"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "OpenClaw before 2026.3.31 contains an allowlist bypass vulnerability in Matrix thread root and reply context handling that fails to properly validate message senders. Attackers can fetch thread-root and reply context messages that should be filtered by sender allowlists, bypassing access controls."}], "id": "CVE-2026-41376", "lastModified": "2026-04-28T20:10:23.367", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "disclosure@vulncheck.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.3, "baseSeverity": "LOW", "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:P/PR:N/UI:P/VC:L/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}]}, "published": "2026-04-28T19:37:40.413", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/openclaw/openclaw/commit/8a563d603b70ef6338915f0527bee87282c3bad5"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-rg8m-3943-vm6q"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/openclaw-matrix-thread-context-allowlist-bypass-via-sender-validation"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-346"}], "source": "disclosure@vulncheck.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,2026.3.31)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "2026.3.31"}}], "enrichment": {"confidence": 100.0, "confidence_source": "inferred", "scores": [{"score": 100.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "OpenClaw", "source": "cna", "vendor": "OpenClaw"}, "product": "openclaw", "vendor": "openclaw"}], "analysis": {"en": {"generated_at": "2026-04-28T23:08:52.664905+00:00", "value": {"mitigation_remediation": ["Upgrade OpenClaw to version 2026.3.31 or later to apply the patched sender validation logic.", "If an upgrade is not immediately possible, enforce stricter sender allowlist checks at the Matrix server layer and manually restrict access to thread\u2011root and reply context messages for unauthorized users.", "Monitor application logs for requests to thread\u2011root or reply contexts that originate from unexpected senders, enabling detection of potential exploitation attempts."], "summary": {"action": "Assess Impact", "impact": "Unauthorized access to Matrix thread root and reply context messages via sender allowlist bypass"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the OpenClaw product from the OpenClaw vendor. Version numbers lower than 2026.3.31 are affected; all releases 2026.3.31 and newer contain the applied fix.", "description_and_impact": "OpenClaw before 2026.3.31 contains an allowlist bypass in its Matrix thread root and reply context handling. The flaw allows attackers to retrieve thread-root and reply context messages that should be restricted by sender allowlists, enabling unauthorized reading of confidential message content. This weakness corresponds to CWE-346, which addresses failure to restrict or lock down access to secured resources.", "risk_and_exploitability": "The CVSS score is 2.3, reflecting a low severity impact. EPSS data is not available, and the vulnerability is not listed in the CISA KEV catalog, suggesting no publicly known exploitation. The likely attack path requires an attacker to send a crafted matrix message that bypasses the sender allowlist, implying an application\u2011level exploitation without privilege escalation. Because of the modest severity and lack of widespread exploitation, the immediate risk to an environment is low but the flaw can still be leveraged to read restricted data if not mitigated."}}}}, "created": "2026-04-28T23:15:43.855222+00:00", "updated": "2026-04-29T00:15:43.178901+00:00", "vendors": ["openclaw", "openclaw$PRODUCT$openclaw"]}