CVE-2026-93761: mongoid (CVSS 7.5)

Description

An inefficient regular expression complexity issue in the in-memory query evaluation component of the Mongoid library may allow an unauthenticated party to cause excessive processing within an embedding application process. Applications that place user-supplied text into a pattern-matching query condition on an embedded association may become unresponsive.

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CVSS v3.1 Score

7.5

HIGH

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

EPSS — Exploit Prediction

0.0046

Probability of exploitation

0.38%

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-1333 CWE-1333

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-5981

Frequently Asked Questions

What is CVE-2026-93761? +

An inefficient regular expression complexity issue in the in-memory query evaluation component of the Mongoid library may allow an unauthenticated party to cause excessive processing within an embedding application process. Applications that place user-supplied text into a pattern-matching query condition on an embedded association may become unresponsive. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-93761? +

CVE-2026-93761 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0046, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-93761? +

CVE-2026-93761 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-2026-93761? +

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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