Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (CWE-74)
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD published the first details for CVE-2026-81526
A CVSS base score of 6.5 has been assigned.
Feedly found the first article mentioning CVE-2026-81526 . See article
CVE-2026-81526 - Exploits & Severity - Feedly
Critical MongoDB Security Vulnerabilities Require Immediate Patching
Cross-database write redirection via unvalidated dotted database name in bulk write namespaces (CVE-2026-81526)
CVE-2026-81526 | MongoDB Rust Driver up to 3.8.1 improper authorization
CVE-2026-81526 - Cross-database write redirection via unvalidated dotted database name in bulk write namespaces
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The full story
This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.
