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.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-e5badbbedc advisory.

    ## libmongoc 1.30.14

    Fixes

    -    Fix handling of large usernames for GSSAPI on Windows. **CVE-2026-114645**


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-bc9f778646 advisory.

    ## libmongoc 1.30.14

    Fixes

    -    Fix handling of large usernames for GSSAPI on Windows. **CVE-2026-114645**


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 45 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-dbe693ee92 advisory.

    ## libmongoc 2.5.7

    Fixes

    -    Fix handling of large usernames for GSSAPI on Windows. **CVE-2026-114645**
    -    Fix container client metadata.




Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-114645)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
376347	Fedora 43 : mongo-c-driver (2026-e5badbbedc)	Nessus	Fedora Local Security Checks	Local	medium
376340	Fedora 44 : mongo-c-driver (2026-bc9f778646)	Nessus	Fedora Local Security Checks	Local	medium
376305	Fedora 45 : mongo-c-driver (2026-dbe693ee92)	Nessus	Fedora Local Security Checks	Local	medium
372270	Linux Distros Unpatched Vulnerability : CVE-2026-114645	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-114645

medium

Tenable Plugins

medium

medium

medium

medium