CVE-2026-106429: Application denial of service via malformed KMS endpoint in MongoDB libmongocrypt
MongoDB · libmongocrypt
Vendor fix available · Affected: MongoDB libmongocrypt · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 21% of scored CVEs
DescriptionCVE.org
An integer underflow in the KMS endpoint-parsing logic of MongoDB libmongocrypt can cause an allocation failure that terminates the application process. This can occur when an authenticated user modifies a key document in the key vault collection, or when an application accepts a KMS endpoint containing a colon after its path or query during key creation. The issue does not access memory outside its allocated bounds.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- MongoDB · libmongocryptfrom 1.1.0 before 1.20.5
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- MongoDB
- Published
- October 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-106429 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.