CVE-2026-107908 (GCVE-0-2026-107908)

Vulnerability from cvelistv5 – Published: 2026-10-09 05:08 – Updated: 2026-10-09 05:08
VLAI
Title
Pre-authentication heap out-of-bounds write in FalkorDB Bolt BoltReadHandler via RESET message
Summary
A heap-based out-of-bounds write in the BoltReadHandler function (src/bolt/bolt_api.c) in FalkorDB before 4.20.0 allows a remote unauthenticated attacker to cause a denial of service and possibly execute arbitrary code by sending a Bolt RESET message with an attacker-chosen chunk size to the Bolt port. The handler checks the size only with ASSERT(), which is compiled out in release builds, then computes a destination pointer from the wire-supplied 16-bit size and moves buffered data up to about 64 KiB backwards past the start of the read buffer. Only deployments that enable the Bolt endpoint (BOLT_PORT, disabled by default) are affected.
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 , < 4.20.0 (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 

{
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      "affected": [
        {
          "collectionURL": "https://github.com/FalkorDB/FalkorDB",
          "cpes": [
            "cpe:2.3:a:falkordb:falkordb:*:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unaffected",
          "modules": [
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          ],
          "product": "FalkorDB",
          "programFiles": [
            "src/bolt/bolt_api.c"
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          "programRoutines": [
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              "name": "BoltReadHandler"
            }
          ],
          "repo": "https://github.com/FalkorDB/FalkorDB",
          "vendor": "FalkorDB",
          "versions": [
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              "lessThan": "4.20.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
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      "credits": [
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          "type": "finder",
          "value": "Arjun Basnet from Securin"
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          "lang": "en",
          "value": "A heap-based out-of-bounds write in the BoltReadHandler function (src/bolt/bolt_api.c) in FalkorDB before 4.20.0 allows a remote unauthenticated attacker to cause a denial of service and possibly execute arbitrary code by sending a Bolt RESET message with an attacker-chosen chunk size to the Bolt port. The handler checks the size only with ASSERT(), which is compiled out in release builds, then computes a destination pointer from the wire-supplied 16-bit size and moves buffered data up to about 64 KiB backwards past the start of the read buffer. Only deployments that enable the Bolt endpoint (BOLT_PORT, disabled by default) are affected."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-100",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-100 Overflow Buffers"
            }
          ]
        }
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      "metrics": [
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      "providerMetadata": {
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        "orgId": "33c584b5-0579-4c06-b2a0-8d8329fcab9c",
        "shortName": "securin"
      },
      "references": [
        {
          "name": "FalkorDB PR #2170",
          "tags": [
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          "url": "https://github.com/FalkorDB/FalkorDB/pull/2170"
        },
        {
          "name": "Fix commit",
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          "url": "https://github.com/FalkorDB/FalkorDB/commit/0b11a00b34b25c4d4fdfe55f0a35c8a00593bd7d"
        },
        {
          "name": "FalkorDB 4.20.0 release notes",
          "tags": [
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          "url": "https://github.com/FalkorDB/FalkorDB/releases/tag/v4.20.0"
        }
      ],
      "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."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "timeline": [
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          "lang": "en",
          "time": "2026-06-29T00:00:00.000Z",
          "value": "Reported to FalkorDB"
        },
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          "lang": "en",
          "time": "2026-06-29T00:00:00.000Z",
          "value": "Vendor acknowledged the report"
        },
        {
          "lang": "en",
          "time": "2026-07-08T00:00:00.000Z",
          "value": "Vendor removed Bolt protocol support (PR #2170)"
        },
        {
          "lang": "en",
          "time": "2026-07-13T00:00:00.000Z",
          "value": "FalkorDB 4.20.0 released without Bolt support"
        },
        {
          "lang": "en",
          "time": "2026-09-27T00:00:00.000Z",
          "value": "Coordinated disclosure period ended"
        }
      ],
      "title": "Pre-authentication heap out-of-bounds write in FalkorDB Bolt BoltReadHandler via RESET message",
      "workarounds": [
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          "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."
        }
      ]
    }
  },
  "cveMetadata": {
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    "assignerShortName": "securin",
    "cveId": "CVE-2026-107908",
    "datePublished": "2026-10-09T05:08:06.419Z",
    "dateReserved": "2026-10-09T04:54:39.618Z",
    "dateUpdated": "2026-10-09T05:08:06.419Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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                ],
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          }
        ],
        "id": "CVE-2026-107908",
        "lastModified": "2026-10-09T06:17:12.243",
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                "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",
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                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
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}



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