MongoDB Server may experience an out-of-memory failure while evaluating expressions that produce deeply nested documents. The issue arises in recursive functions because the server does not periodically check the depth of the expression.
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1849.json"
[
{
"deprecated": false,
"signature_version": "v1",
"digest": {
"threshold": 0.9,
"line_hashes": [
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},
"source": "https://github.com/mongodb/mongo/commit/b409fb494004bf0f7284059b806b3b751a2ec5d9",
"signature_type": "Line",
"id": "CVE-2026-1849-b3f79aa4",
"target": {
"file": "src/mongo/db/service_entry_point_common.cpp"
}
},
{
"deprecated": false,
"signature_version": "v1",
"digest": {
"function_hash": "59615453827642453525115701432201606392",
"length": 9728.0
},
"source": "https://github.com/mongodb/mongo/commit/b409fb494004bf0f7284059b806b3b751a2ec5d9",
"signature_type": "Function",
"id": "CVE-2026-1849-b50a3bee",
"target": {
"file": "src/mongo/db/service_entry_point_common.cpp",
"function": "ExecCommandDatabase::_initiateCommand"
}
}
]