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TI-2026-60060 Aliases CVE-2026-88035GHSA-jgj9-g5rr-w8xg

Heap buffer overflow via wrapped size check during SASL username canonicalization in MongoDB C Driver

Priority LOW 24CWE-190Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.

Summary

A size check in the client-side authentication path of the MongoDB C Driver can wrap around, so an unusually large user-name value is accepted and copied past the end of a small buffer. A party able to set the driver's connection settings may cause the application that embeds the driver to terminate unexpectedly. Reaching this code requires a build in which the optional external SASL authentication backend is present and a connection configured to use it.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00103 0th percentileScored 2026-11-07
Fix Fixed C Driver (MongoDB): 2.5.3

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 Driver2.2.0 to before 2.5.32.5.3Patch availableCNA
  • C Driver VendorMongoDB Affected 2.2.0 to before 2.5.3 Fixed in 2.5.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mongodb:c_driver:*:*:*:*:*:mongodb:*:*1.10.0 to before 1.30.10; 2.2.0 to before 2.5.3VulnerableMongoDB
  • cpe:2.3:a:mongodb:c_driver:*:*:*:*:*:mongodb:*:* Versions 1.10.0 to before 1.30.10; 2.2.0 to before 2.5.3 Vulnerable ·MongoDB

Remediation

  • Fix · CNA C Driver (MongoDB) Fixed in 2.5.3

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-2026-88035
  2. 2026-10-03 Alias added: GHSA-jgj9-g5rr-w8xg
  3. 2026-11-03 Affected versions changed · Red Hat
  4. 2026-11-03 CVSS score added · Red Hat

References

Advisory 1

  • TI-2026-62966 Heap overflow via oversized decrypted TLS record sequence in Windows Secure Channel stream CVSS 4.0CRITICAL 9.2
  • TI-2026-05870 MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow CVSS 4.0HIGH 8.6
  • TI-2026-62968 Integer Underflow → Heap Out-of-Bounds Read in `bson_new_from_buffer() CVSS 4.0MEDIUM 6.9
  • TI-2024-07001 Accessing Untrusted Directory May Allow Local Privilege Escalation CVSS 3.1HIGH 7.8
  • TI-2026-58387 Heap corruption via OCSP request double free from crafted multi-URL certificate in TLS client CVSS 4.0HIGH 8.2
  • TI-2023-00414 MongoDB client C Driver may infinitely loop when validating certain BSON input data CVSS 3.1HIGH 7.5
See all 20 →

Sources

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