Input validation error in mongo-php-library - CVE-2026-81525
Published: September 2, 2026
Vulnerability identifier: #VU146749
CSH Severity: Medium
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-81525
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information and modify data across tenants.
The vulnerability exists due to improper input validation in namespace strings when processing untrusted database or collection names. A remote user can pass a specially crafted database or collection name to disclose sensitive information and modify data across tenants.
The issue may cause operations to target a different database or collection than intended.
Affected software
mongo-php-library
How to mitigate CVE-2026-81525
Install security update from vendor's website.
mongo-php-library - addressed in versions 1.21.4, 2.4.1