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TI-2026-15328 Aliases CVE-2026-18703GHSA-h22h-g2cf-r8hr

Incorrect authorization in MongoDB Server

Priority LOW 11CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

An issue in MongoDB Server could allow a party with a valid client certificate and a corresponding user account to authenticate using a certificate-based authentication method, even when an administrator has configured the server to restrict authentication to other mechanisms. This could allow authentication through a method the administrator intended to disable.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00144 3rd percentileScored 2026-11-07
Fix Fixed MongoDB Server (MongoDB): 8.3.8

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

VendorProductAffected versionsFixed inStatusSource
MongoDBMongoDB Server8.3.0 to before 8.3.88.3.8Patch availableCNA
  • MongoDB Server VendorMongoDB Affected 8.3.0 to before 8.3.8 Fixed in 8.3.8 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*8.2.0 – 8.2.12; 8.3.0 to before 8.3.8VulnerableMongoDB
cpe:2.3:a:mongodb:mongodb:9.0.0:alpha0:*:*:-:-:*:*9.0.0 alpha0VulnerableMongoDB
cpe:2.3:a:mongodb:mongodb:9.0.0:alpha1:*:*:-:-:*:*9.0.0 alpha1VulnerableMongoDB
cpe:2.3:a:mongodb:mongodb:9.1.0:alpha0:*:*:-:-:*:*9.1.0 alpha0VulnerableMongoDB
  • cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:* Versions 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

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    MongoDB Server 8.3.8

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2026-15317 Use-After-Free in MongoDB Timeseries Bucket Handling Leads to Denial of Service and Potential Remote Code ExecutionPriority LOW 36
    • TI-2026-15331 Use-After-Free in MongoDB $graphLookup Aggregation Stage Leads to Denial of Service and Potential Remote Code ExecutionPriority LOW 35
    • TI-2026-15329 Improper Authorization in MongoDB Aggregation Framework Allows Read-Only User to Perform Unauthorized Write OperationsPriority LOW 31
    Show all 5 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-18703
  2. 2026-10-03 Alias added: GHSA-h22h-g2cf-r8hr

References

Advisory 1

  • 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
See all 187 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences