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TI-2026-56621 Aliases CVE-2026-82057GHSA-rchq-qm85-w78g

Type confusion in MongoDB Server

Priority LOW 32CWE-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

A security issue was discovered in MongoDB where an authenticated user with readWrite privileges could crash the mongod server process. By specifying a custom WiredTiger storage configuration option with an incompatible value during collection creation, a user could cause a type confusion in the storage engine layer. When documents were subsequently read from the misconfigured collection, the resulting mismatch in expected data format led to corrupted memory interpretation and a server crash. The crafted collection configuration persists across restarts, requiring manual operator intervention to remediate.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0042 36th percentileScored 2026-11-07
Fix Fixed MongoDB Server (MongoDB): 8.3.9

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 8.3.98.3.9Patch availableCNA
  • MongoDB Server VendorMongoDB Affected 8.3.0 to before 8.3.9 Fixed in 8.3.9 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*8.3.0 to before 8.3.9VulnerableMongoDB
  • cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:* Versions 8.3.0 to before 8.3.9 Vulnerable ·MongoDB

Remediation

  • Fix · CNA MongoDB Server (MongoDB) Fixed in 8.3.9

Fixed in the same release

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

  • Release ·

    MongoDB Server 8.3.9

    7 records Highest priority Priority LOW 7 LOW

    Other records, highest priority first

    • TI-2026-56635 Insufficient Validation of Storage Engine Configuration Options in MongoDB Server Leads to Out-of-Bounds WritePriority LOW 32
    • TI-2026-56625 Use-After-Free in MongoDB Server Query Execution Memory Tracking Subsystem Leads to Denial of ServicePriority LOW 32
    • TI-2026-56637 Incorrect authorization in MongoDB ServerPriority LOW 31
    Show all 7 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82057
  2. 2026-10-03 Alias added: GHSA-rchq-qm85-w78g

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