TI-2026-15336 Aliases CVE-2026-18711 GHSA-xv7q-6jr5-mw96

Use-After-Free in MongoDB Query Execution Engine Leads to Denial of Service and Potential Memory Disclosure

LOW 32CWE-416Published 2026-08-11 · Updated 2026-08-11

Key facts

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

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

Summary

An issue in MongoDB Server's query execution engine could allow an authenticated user with read and write privileges to cause an internal reference to be used after the underlying memory has been freed, when running certain queries against time-series collections. This could result in a server crash or disclosure of freed memory contents within query results.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00494 42nd percentileScored 2026-11-07

Fix Fixed MongoDB Server (MongoDB): 8.3.8, 8.0.29

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 8.3.8; 8.0 to before 8.0.29	8.3.8, 8.0.29	Patch available	CNA

MongoDB Server VendorMongoDB Affected 8.3.0 to before 8.3.8; 8.0 to before 8.0.29 Fixed in 8.3.8, 8.0.29 Patch available CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:mongodb:mongodb::::::::	7.0.0 – 7.0.40; 8.0.0 to before 8.0.29; 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:::-:-::	9.0.0 alpha0	Vulnerable	MongoDB
cpe:2.3:a:mongodb:mongodb:9.0.0:alpha1:::-:-::	9.0.0 alpha1	Vulnerable	MongoDB
cpe:2.3:a:mongodb:mongodb:9.1.0:alpha0:::-:-::	9.1.0 alpha0	Vulnerable	MongoDB

cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:* Versions 7.0.0 – 7.0.40; 8.0.0 to before 8.0.29; 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, 8.0.29

Fixed in the same release

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

Release · 2026-08-11
MongoDB Server 8.0.29, 8.3.8
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2026-15313 Integer underflow in MongoDB ServerPriority LOW 31
Show all 2 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-18711
2026-10-03 Alias added: GHSA-xv7q-6jr5-mw96

References

Patch 1

https://jira.mongodb.org/browse/SERVER-130247

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