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TI-2026-58387 Aliases CVE-2026-84964

Heap corruption via OCSP request double free from crafted multi-URL certificate in TLS client

Priority LOW 35CWE-415Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
None
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-415 and the CVSS impact.

Summary

A double free in the OpenSSL-based TLS certificate revocation checking path of the MongoDB C Driver can be reached by a TLS endpoint that the client already trusts. During the handshake, specially formed certificate data can cause the same heap object to be released twice. An unauthenticated party acting as the trusted endpoint may cause the connecting client application to terminate unexpectedly.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00257 17th 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 Driver1.17.0 to before 1.30.9; 2.0.0 to before 2.5.21.30.9, 2.5.2Patch availableCNA
  • C Driver VendorMongoDB Affected 1.17.0 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:*:*1.17.0 to before 1.30.9; 2.0.0 to before 2.5.2VulnerableMongoDB
  • cpe:2.3:a:mongodb:c_driver:*:*:*:*:*:mongodb:*:* Versions 1.17.0 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-2026-58386 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
    • TI-2026-58388 Heap write primitive via size round-up wrap during JSON parsing on 32-bit buildsPriority LOW 25
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-84964

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-2023-00414 MongoDB client C Driver may infinitely loop when validating certain BSON input data CVSS 3.1HIGH 7.5
  • TI-2026-58386 Silent field truncation via unchecked int cast of huge JSON string values in JSON-to-BSON parser CVSS 4.0MEDIUM 6.3
See all 20 →

Sources

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