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.
An official patch is available. Apply the patch as soon as possible.
CVSS v4.0 Metrics
Exploitability
Attack VectorNetwork
ComplexityLow
RequirementsPresent
PrivilegesLow
User InteractionNone
Threat
Exploit MaturityUnreported
Vulnerable System
ConfidentialityNone
IntegrityNone
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Patch StatusOfficial Patch
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | nvd | patch: Unavailable→Official Patch | 2.3 → 2.3 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 2.3 |
Affected Software
| Vendor | Product | Version |
|---|
| mongodb | mongodb | ≥ 4.0.0, < 4.0.20 |
| mongodb | mongodb | ≥ 3.6.0, < 3.6.21 |
| MongoDB Inc. | MongoDB Server | ≥ 4.0, < 4.0.20 |
| MongoDB Inc. | MongoDB Server | ≥ 3.6, < 3.6.21 |
Published: 2021-03-01
