CVE-2026-93759: mongoid Code Injection (CVSS 8.6)

Description

Mongoid does not neutralize a string-typed query criterion supplied to its query builder, and instead passes it to the database as a server-side JavaScript expression. An unauthenticated party able to influence the value an application supplies as a query argument may cause code of their choosing to be evaluated by the database engine. This may result in unintended disclosure of stored field values, unintended selection of documents for application-initiated writes, and reduced database performance.

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CVSS v3.1 Score

8.6

HIGH

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

EPSS — Exploit Prediction

0.0040

Probability of exploitation

0.32%

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-94 CWE-94

Affected Products

Vendor	Product	Versions
mongodb	mongoid	8.0.0 — 8.0.13
mongodb	mongoid	8.1.0 — 8.1.13
mongodb	mongoid	9.0.0 — 9.0.12
mongodb	mongoid	All

References

Other References

https://jira.mongodb.org/browse/MONGOID-5993

Frequently Asked Questions

What is CVE-2026-93759? +

Mongoid does not neutralize a string-typed query criterion supplied to its query builder, and instead passes it to the database as a server-side JavaScript expression. An unauthenticated party able to influence the value an application supplies as a query argument may cause code of their choosing to be evaluated by the database engine. This may result in unintended disclosure of stored field values, unintended selection of documents for application-initiated writes, and reduced database performance. It has a CVSS v3.1 base score of 8.6 (HIGH).

How severe is CVE-2026-93759? +

CVE-2026-93759 has a CVSS v3.1 score of 8.6 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0040, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-93759? +

CVE-2026-93759 affects products from mongodb, specifically: mongoid. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-93759? +

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.

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