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CVE-2026-5759

Status: DeferredCritical (9.3)—

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.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vector N/AC:L/PR:N permite explotación remota sin privilegios contra FalkorDB; double-free/use-after-free permite ejecución arbitraria o DoS en redis-server.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account ManagementFilter Network TrafficVulnerability ScanningRestrict Web-Based ContentNetwork SegmentationLimit Software Installation

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Falkordb — FalkordbAI

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-5759",
  "cveTags": [],
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          "version": "2.0.3",
          "timestamp": "2026-10-13T15:28:40.207197Z"
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  "affected": [
    {
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      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:falkordb:falkordb:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://github.com/FalkorDB/FalkorDB",
          "vendor": "FalkorDB",
          "modules": [
            "RDB serializer / graph decoder"
          ],
          "product": "FalkorDB",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "4.18.1",
              "versionType": "semver"
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          ],
          "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"
          ],
          "collectionURL": "https://github.com/FalkorDB/FalkorDB",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "RdbLoadDeletedNodes_v17"
            },
            {
              "name": "RdbLoadDeletedNodes_v18"
            },
            {
              "name": "RdbLoadDeletedNodes_v19"
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        }
      ]
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  "published": "2026-10-09T05:16:44.920",
  "references": [
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      "url": "https://github.com/FalkorDB/FalkorDB/commit/523d98ac7ffe99f11a9c95c258025c235f0dff4c",
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      "source": "33c584b5-0579-4c06-b2a0-8d8329fcab9c"
    },
    {
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      "description": [
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          "value": "CWE-415"
        },
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "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."
    }
  ],
  "lastModified": "2026-10-13T18:17:25.287",
  "sourceIdentifier": "33c584b5-0579-4c06-b2a0-8d8329fcab9c"
}