CVE-2026-81525

The MongoDB client library for PHP does not sufficiently sanitize special elements in application-supplied namespace identifiers before using them to construct the target namespace for database operations. An application that incorporates untrusted text into these identifiers may have operations silently directed at a different storage location than the one the application intended.

Score

CVSS 4.0 8.6 High

Status

Analyzed - cna@mongodb.com

Published

2026-08-27

Last modified

2026-08-28

Weaknesses

CWE-943

Affected products

• Php Driver (Mongodb)
• Php Extension (Mongodb)
• Php Library (Mongodb)

References

• https://github.com/mongodb/mongo-php-driver/releases/tag/1.21.6
• https://github.com/mongodb/mongo-php-driver/releases/tag/2.4.1
• https://github.com/mongodb/mongo-php-library/releases/tag/1.21.4
• https://github.com/mongodb/mongo-php-library/releases/tag/2.4.1
• https://jira.mongodb.org/browse/PHPLIB-1927