CVE-2026-5759 (GCVE-0-2026-5759)

Vulnerability from cvelistv5 – Published: 2026-10-09 04:04 – Updated: 2026-10-09 04:04
VLAI
Title
Double free and use-after-free in FalkorDB RdbLoadDeletedNodes allows remote code execution via crafted RDB
Summary
A double free and use-after-free vulnerability in the RdbLoadDeletedNodes function of the RDB graph decoders (src/serializers/decoders/*/decode_graph_entities.c) in FalkorDB before 4.18.1 allows a remote attacker who can issue Redis replication commands (for example, against an instance with no password configured) to cause a denial of service or execute arbitrary code in the redis-server process by supplying a crafted RDB stream whose deleted-nodes buffer length is not a multiple of sizeof(NodeID). The length check relies on ASSERT(), which is compiled out in release builds, so the function continues after freeing the buffer, reading it and freeing it a second time.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
securin CNA under the mitre root
CNA scorecard B 80/100 over 70 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
FalkorDB FalkorDB Affected: 0 , < 4.18.1 (semver)
    cpe:2.3:a:falkordb:falkordb:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Arjun Basnet from Securin
Show details on NVD website
To clipboard 

{
  "containers": {
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      "affected": [
        {
          "collectionURL": "https://github.com/FalkorDB/FalkorDB",
          "cpes": [
            "cpe:2.3:a:falkordb:falkordb:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
            "RDB serializer / graph decoder"
          ],
          "product": "FalkorDB",
          "programFiles": [
            "src/serializers/decoders/current/v19/decode_graph_entities.c",
            "src/serializers/decoders/prev/v18/decode_graph_entities.c",
            "src/serializers/decoders/prev/v17/decode_graph_entities.c"
          ],
          "programRoutines": [
            {
              "name": "RdbLoadDeletedNodes_v17"
            },
            {
              "name": "RdbLoadDeletedNodes_v18"
            },
            {
              "name": "RdbLoadDeletedNodes_v19"
            }
          ],
          "repo": "https://github.com/FalkorDB/FalkorDB",
          "vendor": "FalkorDB",
          "versions": [
            {
              "lessThan": "4.18.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
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          "lang": "en",
          "type": "finder",
          "value": "Arjun Basnet from Securin"
        }
      ],
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          "lang": "en",
          "value": "A double free and use-after-free vulnerability in the RdbLoadDeletedNodes function of the RDB graph decoders (src/serializers/decoders/*/decode_graph_entities.c) in FalkorDB before 4.18.1 allows a remote attacker who can issue Redis replication commands (for example, against an instance with no password configured) to cause a denial of service or execute arbitrary code in the redis-server process by supplying a crafted RDB stream whose deleted-nodes buffer length is not a multiple of sizeof(NodeID). The length check relies on ASSERT(), which is compiled out in release builds, so the function continues after freeing the buffer, reading it and freeing it a second time."
        }
      ],
      "metrics": [
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              "description": "CWE-415 Double Free",
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              "type": "CWE"
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              "description": "CWE-416 Use After Free",
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-09T04:04:28.078Z",
        "orgId": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
        "shortName": "securin"
      },
      "references": [
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          "name": "FalkorDB PR #1843",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/FalkorDB/FalkorDB/pull/1843"
        },
        {
          "name": "Fix commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/FalkorDB/FalkorDB/commit/523d98ac7ffe99f11a9c95c258025c235f0dff4c"
        },
        {
          "name": "FalkorDB 4.18.1 release notes",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/FalkorDB/FalkorDB/releases/tag/v4.18.1"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade FalkorDB to version 4.18.1 or later."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2026-04-07T00:00:00.000Z",
          "value": "Reported to FalkorDB"
        },
        {
          "lang": "en",
          "time": "2026-04-10T00:00:00.000Z",
          "value": "Fix merged by the vendor (PR #1843)"
        },
        {
          "lang": "en",
          "time": "2026-04-12T00:00:00.000Z",
          "value": "FalkorDB 4.18.1 released with the fix"
        },
        {
          "lang": "en",
          "time": "2026-04-13T00:00:00.000Z",
          "value": "CVE ID shared with the vendor"
        }
      ],
      "title": "Double free and use-after-free in FalkorDB RdbLoadDeletedNodes allows remote code execution via crafted RDB",
      "workarounds": [
        {
          "lang": "en",
          "value": "Require authentication on the Redis/FalkorDB instance (requirepass or ACLs), restrict or rename the REPLICAOF/SLAVEOF commands so untrusted clients cannot use them, and do not expose the instance to untrusted networks."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
    "assignerShortName": "securin",
    "cveId": "CVE-2026-5759",
    "datePublished": "2026-10-09T04:04:28.078Z",
    "dateReserved": "2026-04-07T17:26:12.107Z",
    "dateUpdated": "2026-10-09T04:04:28.078Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-10-09",
      "epss": "0.00554",
      "percentile": "0.44555"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://github.com/FalkorDB/FalkorDB",
                "cpes": [
                  "cpe:2.3:a:falkordb:falkordb:*:*:*:*:*:*:*:*"
                ],
                "defaultStatus": "unaffected",
                "modules": [
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                ],
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                "programFiles": [
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                  "src/serializers/decoders/prev/v18/decode_graph_entities.c",
                  "src/serializers/decoders/prev/v17/decode_graph_entities.c"
                ],
                "programRoutines": [
                  {
                    "name": "RdbLoadDeletedNodes_v17"
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                  },
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                    "name": "RdbLoadDeletedNodes_v19"
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        "cveTags": [],
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          {
            "lang": "en",
            "value": "A double free and use-after-free vulnerability in the RdbLoadDeletedNodes function of the RDB graph decoders (src/serializers/decoders/*/decode_graph_entities.c) in FalkorDB before 4.18.1 allows a remote attacker who can issue Redis replication commands (for example, against an instance with no password configured) to cause a denial of service or execute arbitrary code in the redis-server process by supplying a crafted RDB stream whose deleted-nodes buffer length is not a multiple of sizeof(NodeID). The length check relies on ASSERT(), which is compiled out in release builds, so the function continues after freeing the buffer, reading it and freeing it a second time."
          }
        ],
        "id": "CVE-2026-5759",
        "lastModified": "2026-10-09T05:16:45.043",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
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          "cvssMetricV40": [
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                "Recovery": "NOT_DEFINED",
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                "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:H/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",
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                "vulnerabilityResponseEffort": "NOT_DEFINED"
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      }
    }
  }
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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