{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-107909", "assignerOrgId": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "state": "PUBLISHED", "assignerShortName": "securin", "dateReserved": "2026-10-09T04:54:48.677Z", "datePublished": "2026-10-09T05:08:12.082Z", "dateUpdated": "2026-10-09T05:08:12.082Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "shortName": "securin", "dateUpdated": "2026-10-09T05:08:12.082Z"}, "title": "Pre-authentication heap out-of-bounds write in FalkorDB Bolt WebSocket frame handling via unbounded payload length", "descriptions": [{"lang": "en", "value": "A heap-based out-of-bounds write in the ws_read_frame function (src/bolt/ws.c) and the buffer_apply_mask function (src/bolt/buffer.c) in FalkorDB before 4.20.0 allows a remote unauthenticated attacker to cause a denial of service and possibly corrupt heap memory by sending a WebSocket frame with a 64-bit extended payload length to the Bolt port. The payload length is not bounded, and the only bounds check in buffer_apply_mask is an ASSERT(), which is compiled out in release builds, so the function XORs memory beyond the end of the receive buffer with the attacker-supplied mask key. Only deployments that enable the Bolt endpoint (BOLT_PORT, disabled by default) are affected."}], "affected": [{"vendor": "FalkorDB", "product": "FalkorDB", "collectionURL": "https://github.com/FalkorDB/FalkorDB", "repo": "https://github.com/FalkorDB/FalkorDB", "modules": ["Bolt protocol endpoint"], "programFiles": ["src/bolt/ws.c", "src/bolt/buffer.c"], "programRoutines": [{"name": "ws_read_frame"}, {"name": "buffer_apply_mask"}], "cpes": ["cpe:2.3:a:falkordb:falkordb:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "4.20.0", "status": "affected", "versionType": "semver"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N", "baseScore": 8.8, "baseSeverity": "HIGH"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL"}}], "solutions": [{"lang": "en", "value": "Upgrade FalkorDB to version 4.20.0 or later. Bolt protocol support, including the code affected by this issue, was removed in 4.20.0."}], "workarounds": [{"lang": "en", "value": "Leave the Bolt endpoint disabled (do not set the BOLT_PORT module configuration; it is disabled by default), or restrict network access to the Bolt port to trusted clients."}], "references": [{"url": "https://github.com/FalkorDB/FalkorDB/pull/2170", "name": "FalkorDB PR #2170", "tags": ["patch"]}, {"url": "https://github.com/FalkorDB/FalkorDB/commit/0b11a00b34b25c4d4fdfe55f0a35c8a00593bd7d", "name": "Fix commit", "tags": ["patch"]}, {"url": "https://github.com/FalkorDB/FalkorDB/releases/tag/v4.20.0", "name": "FalkorDB 4.20.0 release notes", "tags": ["release-notes"]}], "credits": [{"lang": "en", "type": "finder", "value": "Arjun Basnet from Securin"}], "timeline": [{"time": "2026-06-29T00:00:00.000Z", "lang": "en", "value": "Reported to FalkorDB"}, {"time": "2026-06-29T00:00:00.000Z", "lang": "en", "value": "Vendor acknowledged the report"}, {"time": "2026-07-08T00:00:00.000Z", "lang": "en", "value": "Vendor removed Bolt protocol support (PR #2170)"}, {"time": "2026-07-13T00:00:00.000Z", "lang": "en", "value": "FalkorDB 4.20.0 released without Bolt support"}, {"time": "2026-09-27T00:00:00.000Z", "lang": "en", "value": "Coordinated disclosure period ended"}], "source": {"discovery": "EXTERNAL"}, "impacts": [{"capecId": "CAPEC-100", "descriptions": [{"lang": "en", "value": "CAPEC-100 Overflow Buffers"}]}]}}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://github.com/FalkorDB/FalkorDB", "cpes": ["cpe:2.3:a:falkordb:falkordb:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "modules": ["Bolt protocol endpoint"], "product": "FalkorDB", "programFiles": ["src/bolt/ws.c", "src/bolt/buffer.c"], "programRoutines": [{"name": "ws_read_frame"}, {"name": "buffer_apply_mask"}], "repo": "https://github.com/FalkorDB/FalkorDB", "vendor": "FalkorDB", "versions": [{"lessThan": "4.20.0", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A heap-based out-of-bounds write in the ws_read_frame function (src/bolt/ws.c) and the buffer_apply_mask function (src/bolt/buffer.c) in FalkorDB before 4.20.0 allows a remote unauthenticated attacker to cause a denial of service and possibly corrupt heap memory by sending a WebSocket frame with a 64-bit extended payload length to the Bolt port. The payload length is not bounded, and the only bounds check in buffer_apply_mask is an ASSERT(), which is compiled out in release builds, so the function XORs memory beyond the end of the receive buffer with the attacker-supplied mask key. Only deployments that enable the Bolt endpoint (BOLT_PORT, disabled by default) are affected."}], "id": "CVE-2026-107909", "lastModified": "2026-10-09T06:17:12.413", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.8, "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": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "type": "Secondary"}]}, "published": "2026-10-09T06:17:12.303", "references": [{"source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "url": "https://github.com/FalkorDB/FalkorDB/commit/0b11a00b34b25c4d4fdfe55f0a35c8a00593bd7d"}, {"source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "url": "https://github.com/FalkorDB/FalkorDB/pull/2170"}, {"source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "url": "https://github.com/FalkorDB/FalkorDB/releases/tag/v4.20.0"}], "sourceIdentifier": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.20.0)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "FalkorDB", "source": "cna", "vendor": "FalkorDB"}, "product": "falkordb", "vendor": "falkordb"}], "created": "2026-10-09T06:30:17.785525+00:00", "updated": "2026-10-09T07:30:17.903818+00:00", "vendors": ["falkordb", "falkordb$PRODUCT$falkordb"]}