CVE-2026-81525

HIGHCVSS 8.1/10EPSS 0.48%

Last modified

CVE-2026-81525 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 0.48% chance of exploitation in the next 30 days.

Description

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.

Metrics

Weakness Enumeration

Affected Software

VendorProductVersions
MongodbPhp Driver< 1.21.6
MongodbPhp Driver>= 2.0.0, < 2.4.1
MongodbPhp Library< 1.21.4
MongodbPhp Library>= 2.0.0, < 2.4.1

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is 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.
How severe is CVE-2026-81525?
CVE-2026-81525 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.
How do I fix CVE-2026-81525?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST