CVE-2026-106429 — Application denial of service via malformed KMS endpoint in MongoDB libmongocrypt
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 a…
Published: 2026-10-08 · CVSS: 7.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7