CVE-2026-82057 is a vulnerability in MongoDB
Published on September 8, 2026
Type Confusion in MongoDB Server WiredTiger Storage Engine via Custom Collection Configuration Leads to Persistent Denial of Service
A security issue was discovered in MongoDB where an authenticated user with readWrite privileges could crash the mongod server process. By specifying a custom WiredTiger storage configuration option with an incompatible value during collection creation, a user could cause a type confusion in the storage engine layer. When documents were subsequently read from the misconfigured collection, the resulting mismatch in expected data format led to corrupted memory interpretation and a server crash. The crafted collection configuration persists across restarts, requiring manual operator intervention to remediate.
Vulnerability Analysis
CVE-2026-82057 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is an Object Type Confusion Vulnerability?
The program allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
CVE-2026-82057 has been classified to as an Object Type Confusion vulnerability or weakness.
Products Associated with CVE-2026-82057
Want to know whenever a new CVE is published for MongoDB? stack.watch will email you.
Affected Versions
MongoDB Server:- Version 8.3.0 and below 8.3.9 is affected.