Medium
Security advisory
A user authorized to perform database queries may trigger denial of service by issuing specially crafted query contain a type of regex. This issue affects MongoDB Server v3.6 versions prior to 3.6.21 and MongoDB Server v4.0 versions prior to 4.0.20.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-7929
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:08 UTC · Revision 1
Source evidence
A user authorized to perform database queries may trigger denial of service by issuing specially crafted query contain a type of regex. This issue affects MongoDB Server v3.6 versions prior to 3.6.21 and MongoDB Server v4.0 versions prior to 4.0.20.
osv:CVE-2020-7929
Complete source record
{
"id": "80a6d563057363c89d16493e9f172e13f3a86516f52f6adb6e596962b13f3274",
"url": "https://osv.dev/vulnerability/CVE-2020-7929",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-7929",
"summary": "A user authorized to perform database queries may trigger denial of service by issuing specially crafted query contain a type of regex. This issue affects MongoDB Server v3.6 versions prior to 3.6.21 and MongoDB Server v4.0 versions prior to 4.0.20.",
"evidence": "osv:CVE-2020-7929",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-7929",
"aliases": [
"BIT-mongodb-2020-7929",
"CVE-2020-7929"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/mongodb/mongo",
"type": "GIT",
"events": [
{
"introduced": "a57d8e71e6998a2d0afde7edc11bd23e5661c915"
},
{
"fixed": "1cd2db51dce4b16f4bc97a75056269df0dc0bddb"
},
{
"introduced": "3b07af3d4f471ae89e8186d33bbb1d5259597d51"
},
{
"fixed": "e2416422da84a0b63cde2397d60b521758b56d1b"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.6.0"
},
{
"fixed": "3.6.21"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.0.20"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"r3.6.21-rc2",
"r3.6.21-rc1",
"r3.6.21-rc0",
"r3.6.20-rc2",
"r3.6.20",
"r3.6.20-rc1",
"r3.6.20-rc0",
"r3.6.19-rc0",
"r3.6.19",
"r4.0.19-rc0",
"r4.0.19",
"r3.6.18-rc0",
"r3.6.18",
"r4.0.18-rc0",
"r4.0.18",
"r4.0.17-rc0",
"r4.0.17",
"r4.0.16-rc0",
"r4.0.16",
"r4.0.15-rc0",
"r4.0.15",
"r3.6.17-rc0",
"r3.6.17",
"r4.0.14-rc1",
"r4.0.14",
"r4.0.14-rc0",
"r3.6.16-rc0",
"r3.6.16",
"r3.6.15-rc1",
"r3.6.15",
"r3.6.15-rc0",
"r4.0.13-rc0",
"r4.0.13",
"r3.6.14-rc0",
"r3.6.14",
"r4.0.12-rc2",
"r4.0.12",
"r4.0.12-rc1",
"r4.0.12-rc0",
"r4.0.11-rc0",
"r4.0.11",
"r3.6.13-rc1",
"r3.6.13",
"r3.6.13-rc0",
"r4.0.10-rc1",
"r4.0.10",
"r4.0.10-rc0",
"r3.6.12-rc1",
"r3.6.12",
"r4.0.9-rc0",
"r4.0.9",
"r4.0.8-rc0",
"r4.0.8",
"r3.6.12-rc0",
"r4.0.7-rc1",
"r4.0.7",
"r4.0.7-rc0",
"r3.6.11-rc2",
"r3.6.11",
"r3.6.11-rc1",
"r3.6.11-rc0",
"r4.0.6-rc1",
"r4.0.6",
"r4.0.6-rc0",
"r3.6.9-rc0",
"r3.6.9",
"r3.6.10-rc1",
"r3.6.10",
"r3.6.10-rc0",
"r4.0.5-rc1",
"r4.0.5",
"r4.0.5-rc0",
"r4.0.4-rc2",
"r4.0.4",
"r4.0.4-rc1",
"r4.0.4-rc0",
"r4.0.3-rc0",
"r4.0.3",
"r3.6.8-rc1",
"r3.6.8",
"r3.6.8-rc0",
"r4.0.2-rc0",
"r4.0.2",
"r3.6.7-rc1",
"r3.6.7",
"r3.6.7-rc0",
"r4.0.1-rc1",
"r4.0.1",
"r4.0.1-rc0",
"r3.6.6-rc0",
"r3.6.6",
"r4.0.0",
"r3.6.5-rc0",
"r3.6.5",
"r3.6.4-rc0",
"r3.6.4",
"r3.6.3-rc1",
"r3.6.3",
"r3.6.3-rc0",
"r3.6.2-rc0",
"r3.6.2",
"r3.6.1-rc1",
"r3.6.1",
"r3.6.1-rc0",
"r3.6.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-7929.json"
}
}
],
"modified": "2026-10-24T10:30:49.143792282Z",
"provider": "osv",
"references": [
"https://jira.mongodb.org/browse/SERVER-51083"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*"
],
"vendor_product": "mongodb:mongodb",
"extracted_events": [
{
"range": [
{
"introduced": "3.6.0"
},
{
"fixed": "3.6.21"
},
{
"introduced": "4.0.0"
},
{
"fixed": "4.0.20"
}
],
"source": "CPE_RANGE"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-7929",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 436937,
"published_at": "2021-03-01T16:15:12.747+00:00"
}