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TI-2026-58388 Aliases CVE-2026-84965

Heap write primitive via size round-up wrap during JSON parsing on 32-bit builds

Priority LOW 25CWE-190Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
High
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

An integer wraparound in an allocation size calculation in the BSON library's JSON parsing code can cause a buffer to be released while a following copy operation still writes through the stale pointer. On builds where sizes are 32 bits, an unauthenticated party able to supply a sufficiently large JSON input to an application that links the library may cause that application to terminate unexpectedly, resulting in denial of service.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00125 2nd percentileScored 2026-11-07
Fix Fixed C Driver (MongoDB): 1.30.9, 2.5.2

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 Driver1.10.0 to before 1.30.9; 2.0.0 to before 2.5.21.30.9, 2.5.2Patch availableCNA
  • C Driver VendorMongoDB Affected 1.10.0 to before 1.30.9; 2.0.0 to before 2.5.2 Fixed in 1.30.9, 2.5.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mongodb:c_driver:*:*:*:*:*:mongodb:*:*1.10.0 to before 1.30.9; 2.0.0 to before 2.5.2VulnerableMongoDB
  • cpe:2.3:a:mongodb:c_driver:*:*:*:*:*:mongodb:*:* Versions 1.10.0 to before 1.30.9; 2.0.0 to before 2.5.2 Vulnerable ·MongoDB

Remediation

  • Fix · CNA C Driver (MongoDB) Fixed in 1.30.9, 2.5.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    MongoDB C Driver 1.30.9, 2.5.2

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-58387 Heap corruption via OCSP request double free from crafted multi-URL certificate in TLS clientPriority LOW 35
    • TI-2026-58386 Silent field truncation via unchecked int cast of huge JSON string values in JSON-to-BSON parserPriority LOW 34
    • TI-2026-58392 Heap overflow via truncated base64 encoding of binary fields in length-limited JSON outputPriority LOW 28
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-84965

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