CVE-2026-9747

MEDIUM

Published Jun 9, 2026 Modified Jun 15, 2026 CWE-617

Description

Adding fromRouter:true and runtimeConstants.userRoles could cause aggregations to crash mongodb server.

Is your site exposed to CVE-2026-9747?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0027

Probability of exploitation

0.19%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-617 CWE-617

Affected Products

Vendor	Product	Versions
mongodb	mongodb	7.0.0 — 7.0.35
mongodb	mongodb	8.0.0 — 8.0.24
mongodb	mongodb	8.2.0 — 8.2.10
mongodb	mongodb	8.3.0 — 8.3.3

References

Advisories & Patches

https://jira.mongodb.org/browse/SERVER-123918

Frequently Asked Questions

What is CVE-2026-9747? +

Adding fromRouter:true and runtimeConstants.userRoles could cause aggregations to crash mongodb server. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-9747? +

CVE-2026-9747 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0027, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-9747? +

CVE-2026-9747 affects products from mongodb, specifically: mongodb. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-9747? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-4321

In a Bluetooth device, using RS9116-WiseConnect SDK experiences a Denial of Service, if it receives malformed L2CAP packets, only hard …

CVE-2025-34458

wb2osz/direwolf (Dire Wolf) versions up to and including 1.8, prior to commit 3658a87, contain a reachable assertion vulnerability in the …

CVE-2026-29116

A vulnerability has been found in some Dahua products could allow an unauthenticated remote attacker to send a specially crafted …

CVE-2026-35058

Improper validation of packet length during tls-crypt-v2 key extraction in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows authenticated …

CVE-2026-29115

A vulnerability has been found in some Dahua products could allow an authenticated remote attacker to send a specially crafted …

CVE-2026-13122

OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a …