Type Confusion in MongoDB Query Subsystem Leads to Denial of Service
Priority LOW 31CWE-843Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-843 and the CVSS impact.
Summary
An issue in MongoDB Server's query subsystem could allow an authenticated user with read privileges to cause the server process to terminate unexpectedly by submitting a specially formed query filter. This could result in a denial of service.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00402 34th percentileScored 2026-11-07
Fix Fixed MongoDB Server (MongoDB): 8.3.8, 8.0.29, 7.0.40
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| MongoDB | MongoDB Server | 8.3.0 to before 8.3.8; 8.0 to before 8.0.29; 7.0 to before 7.0.40 | 8.3.8, 8.0.29, 7.0.40 | Patch available | CNA |
- MongoDB Server VendorMongoDB Affected 8.3.0 to before 8.3.8; 8.0 to before 8.0.29; 7.0 to before 7.0.40 Fixed in 8.3.8, 8.0.29, 7.0.40 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:* | 7.0.0 to before 7.0.40; 8.0.0 to before 8.0.29; 8.2.0 – 8.2.12; 8.3.0 to before 8.3.8 | Vulnerable | MongoDB |
| cpe:2.3:a:mongodb:mongodb:9.0.0:alpha0:*:*:-:-:*:* | 9.0.0 alpha0 | Vulnerable | MongoDB |
| cpe:2.3:a:mongodb:mongodb:9.0.0:alpha1:*:*:-:-:*:* | 9.0.0 alpha1 | Vulnerable | MongoDB |
| cpe:2.3:a:mongodb:mongodb:9.1.0:alpha0:*:*:-:-:*:* | 9.1.0 alpha0 | Vulnerable | MongoDB |
- cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:* Versions 7.0.0 to before 7.0.40; 8.0.0 to before 8.0.29; 8.2.0 – 8.2.12; 8.3.0 to before 8.3.8 Vulnerable ·MongoDB
- cpe:2.3:a:mongodb:mongodb:9.0.0:alpha0:*:*:-:-:*:* Versions 9.0.0 alpha0 Vulnerable ·MongoDB
- cpe:2.3:a:mongodb:mongodb:9.0.0:alpha1:*:*:-:-:*:* Versions 9.0.0 alpha1 Vulnerable ·MongoDB
- cpe:2.3:a:mongodb:mongodb:9.1.0:alpha0:*:*:-:-:*:* Versions 9.1.0 alpha0 Vulnerable ·MongoDB
Remediation
- Fix · CNA MongoDB Server (MongoDB) Fixed in 8.3.8, 8.0.29, 7.0.40
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
MongoDB Server 7.0.40, 8.0.29, 8.3.8
17 records Highest priority Priority MEDIUM 2 MEDIUM, 15 LOW
Other records, highest priority first
- TI-2026-15322 Improper Input Validation in MongoDB Aggregation Framework Allows Unauthenticated Denial of Service on mongosPriority MEDIUM 44
- TI-2026-15316 Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential ExposurePriority MEDIUM 41
- TI-2026-15318 Out-of-bounds write in MongoDB ServerPriority LOW 32
Timeline
- 2026-10-02 Threatist record created from CVE-2026-18701
- 2026-10-03 Alias added: GHSA-m7wq-2pg8-h638
References
More Mongodb vulnerabilities
- TI-2025-13542 Zlib compressed protocol header length confusion may allow memory read KEVCVSS 4.0HIGH 8.7
- TI-2013-01669 MongoDB before 2.0.9 and 2.2.x before 2.2.4 does not properly validate requests to the… CVSS 2.0MEDIUM 6.0
- TI-2026-56639 Uncontrolled Resource Consumption in MongoDB Sharded Cluster Router Allows Unauthenticated Denial of Service CVSS 4.0HIGH 8.7
- TI-2026-56628 Reachable assertion in MongoDB Server CVSS 4.0HIGH 8.7
- TI-2026-15322 Improper Input Validation in MongoDB Aggregation Framework Allows Unauthenticated Denial of Service on mongos CVSS 4.0HIGH 8.7
- TI-2026-08537 Unbounded recursion in BSONColumn interleaved-reference causes pre-auth stack overflow CVSS 4.0HIGH 8.7
Sources
- CVE-2026-18701 · CVE Program
- CVE-2026-18701 · NVD
- FIRST EPSS
- GHSA-m7wq-2pg8-h638 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences