CVE-2026-93393

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Source

https://cve.org/CVERecord?id=CVE-2026-93393

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93393.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-93393

Downstream

Published

2026-09-17T20:26:38Z

Modified

2026-10-08T02:52:36Z

Severity

9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

Heap overflow via oversized decrypted TLS record sequence in Windows Secure Channel stream

Details

A heap-based buffer overflow exists in the TLS transport layer of the MongoDB C Driver when built with the Windows platform TLS backend. A remote endpoint that the client connects to can cause the driver to write uncontrolled data outside the bounds of a heap allocation while processing incoming encrypted traffic after the TLS handshake completes. No authentication or user interaction is required, because the affected processing occurs before any application-level authentication completes. Triggering this issue may lead to memory corruption in the client process, disclosure of adjacent heap memory, or termination of the process.

Database specific

{
    "cna_assigner": "mongodb",
    "cwe_ids": [
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93393.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "2.3.0"
                },
                {
                    "last_affected": "2.3.3"
                },
                {
                    "introduced": "2.2.0"
                },
                {
                    "last_affected": "2.2.4"
                },
                {
                    "introduced": "2.1.0"
                },
                {
                    "last_affected": "2.1.2"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "last_affected": "2.0.2"
                },
                {
                    "introduced": "1.30.0"
                },
                {
                    "last_affected": "1.30.8"
                },
                {
                    "introduced": "1.29.0"
                },
                {
                    "last_affected": "1.29.2"
                },
                {
                    "introduced": "1.28.0"
                },
                {
                    "last_affected": "1.28.1"
                },
                {
                    "introduced": "1.27.0"
                },
                {
                    "last_affected": "1.27.6"
                },
                {
                    "introduced": "1.26.0"
                },
                {
                    "last_affected": "1.26.2"
                },
                {
                    "introduced": "1.25.0"
                },
                {
                    "last_affected": "1.25.4"
                },
                {
                    "introduced": "1.24.0"
                },
                {
                    "last_affected": "1.24.4"
                },
                {
                    "introduced": "2.4.0"
                },
                {
                    "last_affected": "2.4.0"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}

References

Affected packages

Git / github.com/mongodb/mongo-c-driver

Affected ranges

Type

GIT

Repo

https://github.com/mongodb/mongo-c-driver

Events

Introduced

1cb8a16e863cea77a61530b832ed2c7c1dc5c065

Fixed

c3febede70c3b8955905f4de519326069e80483c

Introduced

9ad750264dbdf6eb23efa6859b7488a8275ae693

Fixed

ad87ab88907a0105823469fb5d393ed717bed9ba

Database specific

Show details

{
    "cpe": "cpe:2.3:a:mongodb:c_driver:*:*:*:*:*:mongodb:*:*",
    "extracted_events": [
        {
            "introduced": "1.10.0"
        },
        {
            "fixed": "1.30.11"
        },
        {
            "introduced": "2.2.0"
        },
        {
            "fixed": "2.5.4"
        }
    ],
    "source": "CPE_RANGE"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93393.json"