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CVE-2026-114645VulnerabilityPublished Updated

Mongo c driver: A 32-bit integer wraparound in the MongoDB C Driver's Windows-only Kerberos/SSPI authentication code

Affects mongo-c-driverSource GCVE Database

0
Authoritative record:CVE-2026-114645· Medium 5.7

Not known to be exploited · CVSS 5.7 Medium.

Data as of 28 Oct 2026, 22:31 UTC

CVSS 4.0 base score
5.7Medium
How severe the flaw is on the 0–10 CVSS scale.
CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10mongo-c-driverpkg:deb/ubuntu/mongo-c-driver?arch=source&distro=stonkingOther threatsAffected
  • 2.2.2-1 – 2.5.0-1
5 affected builds
Fixed in–
Ubuntu 26.04 LTSmongo-c-driverpkg:deb/ubuntu/mongo-c-driver?arch=source&distro=resoluteOther threatsAffected
  • 1.30.4-1ubuntu1 – 2.2.2-1
4 affected builds
Fixed in–
Ubuntu Pro 24.04 LTSmongo-c-driverpkg:deb/ubuntu/mongo-c-driver?arch=source&distro=esm-apps/nobleOther threatsAffected
  • 1.24.3-1 – 1.26.0-1.1ubuntu2+esm1
9 affected builds
Fixed in–
Ubuntu Pro 22.04 LTSmongo-c-driverpkg:deb/ubuntu/mongo-c-driver?arch=source&distro=esm-apps/jammyOther threatsAffected
  • 1.18.0-1 – 1.21.0-1ubuntu0.1~esm1
9 affected builds
Fixed in–
Ubuntu Pro 20.04 LTSmongo-c-driverpkg:deb/ubuntu/mongo-c-driver?arch=source&distro=esm-apps/focalOther threatsAffected
  • 1.15.0-1 – 1.16.1-1ubuntu0.1~esm1
8 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

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.

References

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