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TI-2026-63123 Aliases CVE-2026-93761GHSA-6c34-f5wx-m58m

Denial of service via unbounded regex matching in Mongoid's in-memory query matcher

Priority MEDIUM 44CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-1333.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0046 40th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MongoDBMongoid7.2.0 – 7.2.6; 7.3.0 – 7.3.5; 7.4.0 – 7.4.3; 7.5.0 – 7.5.4; 7.6.0 – 7.6.1; 8.0.0 – 8.0.12; 8.1.0 – 8.1.12; 9.0.0 – 9.0.11; 9.1.0—No fix listedCNA
  • Mongoid VendorMongoDB Affected 7.2.0 – 7.2.6; 7.3.0 – 7.3.5; 7.4.0 – 7.4.3; 7.5.0 – 7.5.4; 7.6.0 – 7.6.1; 8.0.0 – 8.0.12; 8.1.0 – 8.1.12; 9.0.0 – 9.0.11; 9.1.0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:mongodb:mongoid:*:*:*:*:*:*:*:*8.0.0 to before 8.0.13; 8.1.0 to before 8.1.13; 9.0.0 to before 9.0.12VulnerableMongoDB
cpe:2.3:a:mongodb:mongoid:9.1.0:*:*:*:*:*:*:*9.1.0VulnerableMongoDB
  • cpe:2.3:a:mongodb:mongoid:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.0.13; 8.1.0 to before 8.1.13; 9.0.0 to before 9.0.12 Vulnerable ·MongoDB
  • cpe:2.3:a:mongodb:mongoid:9.1.0:*:*:*:*:*:*:* Versions 9.1.0 Vulnerable ·MongoDB

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-93761
  2. 2026-10-03 Alias added: GHSA-6c34-f5wx-m58m

References

Other 1

  • TI-2026-63124 Data deletion and attribute disclosure via field-name method injection in in-memory queries CVSS 4.0CRITICAL 9.2
  • TI-2026-63121 Server-side JavaScript injection via string query criteria bypassing the strict operator allowlist CVSS 4.0HIGH 8.8
  • TI-2026-63127 Document deletion and process crash via unvalidated method-name dispatch in atomic pop operation CVSS 4.0HIGH 8.3
  • TI-2026-63122 NoSQL injection of JavaScript-executing query operators via unsafe-by-default operator guard CVSS 4.0HIGH 8.3
  • TI-2026-63120 Cross-principal document update, theft, and deletion via unvalidated id in nested attributes CVSS 4.0HIGH 8.6
  • TI-2026-63126 Plaintext storage of encrypted fields via skipped embedded models in encryption schema generation CVSS 4.0HIGH 7.1
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences