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TI-2026-08539 Aliases CVE-2026-9742GHSA-qwqf-36v4-65w4

Authenticate command with specific mechanism parameter can trigger server crash

Priority LOW 36CWE-1287Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

When OIDC authentication is enabled in configuration, clients may set specific values in the "mechanism" parameter of the "authenticate" command that lead to server crash. The authenticate command is accessible to unauthenticated clients, leading to pre-auth denial-of-service in affected product configurations.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00347 28th percentileScored 2026-11-07
Fix Fixed MongoDB Server (MongoDB): 8.3.3, 8.2.10

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 8.3.3; 8.2.0 to before 8.2.108.3.3, 8.2.10Patch availableCNA
  • MongoDB Server VendorMongoDB Affected 8.3.0 to before 8.3.3; 8.2.0 to before 8.2.10 Fixed in 8.3.3, 8.2.10 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*8.2.0 to before 8.2.10; 8.3.0 to before 8.3.3VulnerableMongoDB
  • cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:* Versions 8.2.0 to before 8.2.10; 8.3.0 to before 8.3.3 Vulnerable ·MongoDB

Remediation

  • Fix · CNA MongoDB Server (MongoDB) Fixed in 8.3.3, 8.2.10

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-9742
  2. 2026-10-03 Alias added: GHSA-qwqf-36v4-65w4

References

Patch 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