Vulnerability-Lookup

CVE-2026-18888 (GCVE-0-2026-18888)

Vulnerability from cvelistv5 – Published: 2026-08-12 20:29 – Updated: 2026-08-13 14:14

Title

MongoDB BI Connector ODBC driver may write outside an allocated buffer when retrieving large floating point values as character data

Summary

The MongoDB BI Connector ODBC Driver converts floating point column values into text without checking that the result fits within the destination buffer. When an application reads a sufficiently large floating point value as text, the driver may write beyond the end of that buffer and corrupt adjacent memory. A user who can store data in a collection read through the BI Connector could use this to crash the application performing the read.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-13 14:11 UTC

CWE

CWE-787 - Out-of-bounds write

Assigner

mongodb

References

1 reference

URL	Tags
https://github.com/mongodb/mongo-bi-connector-odb…

Impacted products

1 product

Vendor	Product	Version
MongoDB	BI Connector ODBC Driver	Affected: 1.0.0 , < 1.4.9 (semver)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-18888

Vulnerability from fkie_nvd - Published: 2026-08-12 21:17 - Updated: 2026-08-13 15:19

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	cna@mongodb.com	https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases/tag/v1.4.9

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "BI Connector ODBC Driver",
          "repo": "https://github.com/mongodb/mongo-bi-connector-odbc-driver",
          "vendor": "MongoDB",
          "versions": [
            {
              "lessThan": "1.4.9",
              "status": "affected",
              "version": "1.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
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    }
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    }
  ],
  "id": "CVE-2026-18888",
  "lastModified": "2026-08-13T15:19:36.620",
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          "userInteraction": "NONE",
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GHSA-HCWQ-44XG-QQ4G

Vulnerability from github – Published: 2026-08-12 21:31 – Updated: 2026-08-12 21:31

Details

Severity

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

7.1 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-18888"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-12T21:17:37Z",
    "severity": "HIGH"
  },
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  "id": "GHSA-hcwq-44xg-qq4g",
  "modified": "2026-08-12T21:31:44Z",
  "published": "2026-08-12T21:31:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18888"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases/tag/v1.4.9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-18888 (GCVE-0-2026-18888)

FKIE_CVE-2026-18888

GHSA-HCWQ-44XG-QQ4G

Tags

Sightings

Nomenclature