CVE-2026-81526

Cross-database write redirection via unvalidated dotted database name in bulk write namespaces

Published Aug 27, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
Description
The MongoDB Rust Driver does not neutralize special characters in a caller-supplied target identifier before embedding it in the request it sends to the server. An actor able to influence that identifier in an application using the driver may cause write operations to be applied to an unintended target within the same deployment using the application's own credentials. This may result in unauthorized modification of data belonging to another logical boundary enforced by the application.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Mongodb rust Driver
CPEs cpe:2.3:a:mongodb:rust_driver:*:*:*:*:*:mongodb:*:*
Vendors & Products Mongodb rust Driver
Type Values Removed Values Added
First Time appeared Mongodb
Mongodb rust-driver
Vendors & Products Mongodb
Mongodb rust-driver
Type Values Removed Values Added
Description The MongoDB Rust Driver does not neutralize special characters in a caller-supplied target identifier before embedding it in the request it sends to the server. An actor able to influence that identifier in an application using the driver may cause write operations to be applied to an unintended target within the same deployment using the application's own credentials. This may result in unauthorized modification of data belonging to another logical boundary enforced by the application.
Title Cross-database write redirection via unvalidated dotted database name in bulk write namespaces
Weaknesses CWE-74
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mongodb
Published
Updated
Aug 28, 2026, 3:48 PM
Reserved
Aug 26, 2026, 10:14 PM
Status
Analyzed
Published
Aug 27, 2026, 8:18 PM
Modified
Sep 29, 2026, 7:16 PM