MongoDB PHP Driver up to 1.21.9/2.1.9/2.5.2 Command Monitoring deserialization

Summaryinfo

A vulnerability marked as very critical has been reported in MongoDB PHP Driver up to 1.21.9/2.1.9/2.5.2. The affected element is an unknown function of the component Command Monitoring. This manipulation causes deserialization. This vulnerability is registered as CVE-2026-96745. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in MongoDB PHP Driver up to 1.21.9/2.1.9/2.5.2. It has been declared as very critical. Affected by this vulnerability is an unknown code of the component Command Monitoring. The manipulation with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Deserialization of untrusted data in the command monitoring support of the MongoDB PHP Driver can cause class names embedded in document content to be honored when the driver builds monitoring event objects. When an application registers a command monitoring subscriber and includes untrusted data in a database operation, an unauthenticated party who controls that data may cause an application class implementing the driver's persistable interface to be instantiated and its unserialization method invoked with the supplied data. The resulting impact depends on the classes available in the application.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-96745 since 09/23/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/24/2026).

Upgrading to version 1.21.10, 2.1.10 or 2.5.3 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Database Software

Vendor

• MongoDB

Name

• PHP Driver

Version

• 1.21.0
• 1.21.1
• 1.21.2
• 1.21.3
• 1.21.4
• 1.21.5
• 1.21.6
• 1.21.7
• 1.21.8
• 1.21.9
• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7
• 2.1.8
• 2.1.9
• 2.5.0
• 2.5.1
• 2.5.2

License

• open-source

CPE 2.3info

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• 🔒
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CPE 2.2info

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