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TI-2026-79423 Aliases CVE-2026-114645

Heap overflow in MongoDB C Driver Windows Kerberos authentication

Priority LOW 25CWE-190Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
High
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
Low · Low · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

MongoDB C Driver from 1.6.0 before 1.30.14 and from 2.0.0 before 2.5.7 is affected. A 32-bit integer wraparound (CWE-190) allocates an undersized heap buffer for an overlong credential value in the client configuration. A party controlling that client-side configuration can write outside the buffer, corrupting client memory and denying service to the application. Only Windows client builds with the Windows-native authentication backend are affected.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A 32-bit integer wraparound in the MongoDB C Driver's Windows-only Kerberos/SSPI authentication code can cause an undersized heap buffer to be allocated when an excessively long credential value is supplied in the client's connection configuration. A party able to control that client-side configuration, in conjunction with the affected authentication mechanism, can cause the driver to write outside the bounds of the allocated buffer. This may result in corruption of client process memory and denial of service of the client application. The issue affects only client builds compiled with the Windows-native authentication backend.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00166 5th percentileScored 2026-11-07
Fix Fixed C Driver (MongoDB): 1.30.14, 2.5.7

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
MongoDBC Driver1.6.0 to before 1.30.14; 2.0.0 to before 2.5.71.30.14, 2.5.7Patch availableCNA
  • C Driver VendorMongoDB Affected 1.6.0 to before 1.30.14; 2.0.0 to before 2.5.7 Fixed in 1.30.14, 2.5.7 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:c_driver:*:*:*:*:*:*:*:*——MongoDB
  • cpe:2.3:a:mongodb:c_driver:*:*:*:*:*:*:*:* Versions — — ·MongoDB

Remediation

Upgrade MongoDB C Driver to 1.30.14 or 2.5.7, the fixed versions for the 1.x and 2.x branches.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA C Driver (MongoDB) Fixed in 1.30.14, 2.5.7

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-22 Threatist record created from CVE-2026-114645
  2. 2026-10-23 1 new reference · CNA
  3. 2026-10-23 Affected versions changed · Red Hat
  4. 2026-10-23 CVSS score added · Red Hat
  5. 2026-10-23 Priority changed: MEDIUM → LOW
  6. 2026-10-29 CISA SSVC decision points changed

References

Other 4

  • 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