A use-after-free vulnerability exists in MongoDB Server's server-side JavaScript engine when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who is able to run server-side JavaScript (for example, via $where or $function) can cause the server to access memory that has already been freed. This may result in disclosure of information from the mongod process memory or a denial of service through a server crash.
{
"unresolved_ranges": [
{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "8.3.0"
},
{
"last_affected": "8.3.3"
},
{
"introduced": "8.2.0"
},
{
"last_affected": "8.2.10"
},
{
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},
{
"last_affected": "8.0.25"
},
{
"introduced": "7.0.0"
},
{
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},
{
"introduced": "6.0"
},
{
"last_affected": "6.0.28"
},
{
"introduced": "5.0"
},
{
"last_affected": "5.0.33"
},
{
"introduced": "4.4.0"
},
{
"last_affected": "4.4.30"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/11xxx/CVE-2026-11933.json",
"cna_assigner": "mongodb",
"cwe_ids": [
"CWE-787"
]
}{
"source": "CPE_RANGE",
"cpe": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*",
"extracted_events": [
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.31"
},
{
"introduced": "5.0.0"
},
{
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},
{
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{
"fixed": "6.0.29"
},
{
"introduced": "7.0.0"
},
{
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},
{
"introduced": "8.0.0"
},
{
"fixed": "8.0.26"
},
{
"introduced": "8.2.0"
},
{
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},
{
"introduced": "8.3.0"
},
{
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}
]
}