TI-2026-56622 Aliases CVE-2026-82058 GHSA-r492-gcgw-xqm5

Unhandled Exception in MongoDB Server JSON Schema Validation Error Generation Leads to Denial of Service

LOW 31CWE-248Published 2026-09-08 · Updated 2026-09-08

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-248.

Summary

A flaw in MongoDB's JSON Schema validation error generation code allows an authenticated user with readWrite privileges to crash the mongod server. When a BSON document containing an array with a malformed numeric field name fails a $jsonSchema items type constraint, the error generation path performs unsafe numeric conversion on the user-controlled field name without proper exception handling, resulting in an uncaught exception that terminates the server process. This is possible because incoming wire protocol BSON validation does not enforce that array element field names are valid, in-range numeric indices.

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): 8.3.9, 8.0.30, 7.0.41

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 8.3.9; 8.0.0 to before 8.0.30; 7.0.0 to before 7.0.41	8.3.9, 8.0.30, 7.0.41	Patch available	CNA

MongoDB Server VendorMongoDB Affected 8.3.0 to before 8.3.9; 8.0.0 to before 8.0.30; 7.0.0 to before 7.0.41 Fixed in 8.3.9, 8.0.30, 7.0.41 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mongodb:mongodb:::::-:::*	7.0.0 to before 7.0.41; 8.0.0 to before 8.0.30; 8.3.0 to before 8.3.9	Vulnerable	MongoDB

cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:* Versions 7.0.0 to before 7.0.41; 8.0.0 to before 8.0.30; 8.3.0 to before 8.3.9 Vulnerable ·MongoDB

Remediation

Fix · CNA MongoDB Server (MongoDB) Fixed in 8.3.9, 8.0.30, 7.0.41

Fixed in the same release

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

Release · 2026-09-08
MongoDB Server 7.0.41, 8.0.30, 8.3.9
16 records Highest priority Priority MEDIUM 3 MEDIUM, 13 LOW
Other records, highest priority first
- TI-2026-56639 Uncontrolled Resource Consumption in MongoDB Sharded Cluster Router Allows Unauthenticated Denial of ServicePriority MEDIUM 44
- TI-2026-56628 Reachable assertion in MongoDB ServerPriority MEDIUM 44
- TI-2026-56631 Improper Case Sensitivity Handling in MongoDB Server Configuration Validation May Cause…Priority MEDIUM 42
Show all 16 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-82058
2026-10-03 Alias added: GHSA-r492-gcgw-xqm5

References

Advisory 1

https://jira.mongodb.org/browse/SERVER-130926

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

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