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.
Published: 2026-09-18
Score: 8.7 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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History

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
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.
Title Denial of service via unbounded regex matching in Mongoid's in-memory query matcher
Weaknesses CWE-1333
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

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cve-icon MITRE

Status: PUBLISHED

Assigner: mongodb

Published:

Updated: 2026-09-18T17:20:34.623Z

Reserved: 2026-09-18T16:51:40.241Z

Link: CVE-2026-93761

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-18T18:18:34.917

Modified: 2026-09-18T19:05:01.127

Link: CVE-2026-93761

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses
  • CWE-1333

    Inefficient Regular Expression Complexity