MongoDB C Driver up to 1.30.14/2.5.7 memory leak

Summaryinfo

A vulnerability classified as critical was found in MongoDB C Driver up to 1.30.14/2.5.7. Affected is an unknown function. Executing a manipulation can lead to memory leak. This vulnerability appears as CVE-2026-120678. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability has been found in MongoDB C Driver up to 1.30.14/2.5.7 and classified as critical. This vulnerability affects an unknown function. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. CVE summarizes:

A memory management flaw in the MongoDB C Driver's handling of compressed responses may cause the client library to hold on to memory that is never released. An unauthenticated party that controls the database endpoint a client application connects to may cause repeated, unbounded memory growth in that application, which may result in the application becoming unavailable. No credentials, transport security settings, or user interaction are required.

The advisory is shared for download at jira.mongodb.org. This vulnerability was named CVE-2026-120678 since 11/02/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Database Software

Vendor

• MongoDB

Name

• C Driver

Version

• 1.30.0
• 1.30.1
• 1.30.2
• 1.30.3
• 1.30.4
• 1.30.5
• 1.30.6
• 1.30.7
• 1.30.8
• 1.30.9
• 1.30.10
• 1.30.11
• 1.30.12
• 1.30.13
• 1.30.14
• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4
• 2.5.5
• 2.5.6
• 2.5.7

License

• open-source

CPE 2.3info

• 🔒
• 🔒
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CPE 2.2info

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