An authenticated user can cause excess memory usage via bitwise match expression AST processing of $bitsAllSet, $bitsAnySet, $bitsAllClear, and $bitsAnyClear. This contributes to memory pressure and may lead to availability loss by OOM.
This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.
< 7.0.34 - AFFECTED
< 8.0.23 - AFFECTED
< 8.2.9 - AFFECTED
< 8.3.2 - AFFECTED
{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-8199",
"assignerOrgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb",
"assignerShortName": "mongodb",
"dateUpdated": "2026-05-13T00:05:22.748Z",
"dateReserved": "2026-05-08T23:41:03.607Z",
"datePublished": "2026-05-13T00:05:22.748Z",
"state": "PUBLISHED"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "a39b4221-9bd0-4244-95fc-f3e2e07f1deb",
"shortName": "mongodb",
"dateUpdated": "2026-05-13T00:05:22.748Z"
},
"title": "Post-auth memory exhaustion via bitwise match expressions",
"descriptions": [
{
"lang": "en",
"value": "An authenticated user can cause excess memory usage via bitwise match expression AST processing of $bitsAllSet, $bitsAnySet, $bitsAllClear, and $bitsAnyClear. This contributes to memory pressure and may lead to availability loss by OOM.\n\nThis issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.",
"supportingMedia": [
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"value": "An authenticated user can cause excess memory usage via bitwise match expression AST processing of $bitsAllSet, $bitsAnySet, $bitsAllClear, and $bitsAnyClear. This contributes to memory pressure and may lead to availability loss by OOM.<br><br>This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.<br><br><br><br>"
}
]
}
],
"affected": [
{
"vendor": "MongoDB, Inc.",
"product": "MongoDB Server",
"defaultStatus": "unaffected",
"versions": [
{
"version": "7.0",
"status": "affected",
"versionType": "custom",
"lessThan": "7.0.34"
},
{
"version": "8.0",
"status": "affected",
"versionType": "custom",
"lessThan": "8.0.23"
},
{
"version": "8.2",
"status": "affected",
"versionType": "custom",
"lessThan": "8.2.9"
},
{
"version": "8.3",
"status": "affected",
"versionType": "custom",
"lessThan": "8.3.2"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"description": "CWE-1325: Improperly Controlled Sequential Memory Allocation",
"cweId": "CWE-1325",
"type": "CWE"
}
]
}
],
"references": [
{
"url": "https://jira.mongodb.org/browse/SERVER-122449",
"tags": [
"issue-tracking"
]
}
],
"metrics": [
{
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
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"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM"
}
}
]
}
}
}