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TI-2026-84466 Aliases CVE-2026-120673

MongoDB Rust Driver tracing exposes plaintext before encryption

Priority LOW 29CWE-532Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-532.

Summary

The MongoDB Rust Driver from 3.4.0 before 3.9.1 has a flaw in its diagnostic tracing component, which records command content before automatic client-side field level encryption is applied. This is insertion of sensitive information into a log file (CWE-532). When tracing and automatic in-use encryption are both enabled, a local user with low privileges who can read exported trace data can obtain field values the application designated for encryption, without the encryption keys.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

A component of the MongoDB Rust Driver that records diagnostic tracing data can capture command content before automatic client-side field level encryption is applied. In deployments that turn on the optional tracing capability together with automatic in-use encryption, a party with read access to the application's exported trace data may obtain field values that the application designated for encryption, without access to the encryption keys. This may result in unintended disclosure of data.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00101 0th percentileScored 2026-11-07
Fix Partial Rust Driver (MongoDB): 3.9.1Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
MongoDBRust Driver3.4.0 to before 3.9.13.9.1Patch availableCNA
  • Rust Driver VendorMongoDB Affected 3.4.0 to before 3.9.1 Fixed in 3.9.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:mongodb:rust_driver:*:*:*:*:*:*:*:*——MongoDB
  • cpe:2.3:a:mongodb:rust_driver:*:*:*:*:*:*:*:* Versions — — ·MongoDB

Remediation

Upgrade MongoDB Rust Driver to version 3.9.1, which fixes the flaw. The sources list no fixed version for Logging Subsystem for Red Hat OpenShift.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA Rust Driver (MongoDB) Fixed in 3.9.1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Logging Subsystem for Red Hat OpenShiftAffectedNo fix planned: Out of support scope

Timeline

  1. 2026-11-03 Threatist record created from CVE-2026-120673
  2. 2026-11-03 CISA SSVC decision points changed
  3. 2026-11-03 Priority changed: MEDIUM → LOW
  4. 2026-11-04 Affected versions changed · Red Hat
  5. 2026-11-04 CVSS score added · Red Hat

References

Other 1

  • TI-2019-08023 Code injection in mongo-express KEVCVSS 3.1CRITICAL 9.9
  • TI-2025-13542 Zlib compressed protocol header length confusion may allow memory read KEVCVSS 4.0HIGH 8.7
  • TI-2026-79432 BSON output corruption via out-of-range binary subtype in MongoDB C# Driver CVSS 4.0MEDIUM 6.9
  • TI-2026-79424 NoSQL command injection via mismatched BSON length in MongoDB C# Driver CVSS 4.0MEDIUM 6.9
  • TI-2026-79422 Unbounded memory growth in MongoDB C# Driver BSON deserialization CVSS 4.0HIGH 8.2
  • TI-2026-79427 Authentication bypass via issuer-and-serial-only certificate equality CVSS 4.0HIGH 7.6
See all 376 →

Sources

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