Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2018-20802

22
FAUCET Score

CVE-2018-20802 describes a denial-of-service vulnerability in MongoDB Server versions prior to 3.6.9 and 4.0.3, where an authenticated user can crash the database by issuing specially crafted queries with compound indexes. This issue has a CVSS score of 6.5 (Medium), indicating it can be exploited remotely with low complexity by a low-privileged user, leading to high availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion, though it has received limited media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.6.0, < 3.6.9CPE matchmatch criteria
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*
>= 4.0.0, < 4.0.3CPE matchmatch criteria
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.46%
Probability of exploitation in next 30 days
EPSS Percentile
70.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0146 is in the 85th percentile among its peer group of 21,951 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

ubuntupatch availablevia ubuntu_usn
Product: mongodb (bionic)Fixed in: 1:3.6.3-0ubuntu1.4+esm1
ubuntupatch availablevia ubuntu_usn
Product: mongodb (trusty)Fixed in: 1:2.4.9-1ubuntu2+esm2
ubuntupatch availablevia ubuntu_usn
Product: mongodb (xenial)Fixed in: 1:2.6.10-0ubuntu1+esm2
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-mongodb36-mongodb

Vendor Advisories (2)

ubuntuUSN-8064-1

MongoDB vulnerabilities

Feb 25, 2026
redhatCVE-2018-20802Moderate

mongodb: Denial of service via crafted queries with compound indexes affecting QueryPlanner

Nov 23, 2020

References

jira.mongodb.org / browse/SERVER-36993
Issue TrackingVendor Advisory