Vulnerability in MongoDB Rust Driver
CVE-2026-81526
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (27.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/mongodb/mongo-rust-driver/releases/tag/v3.8.2 (Product, Release Notes)
- jira.mongodb.org/browse/RUST-2467 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-81526?
- CVE-2026-81526 is a medium-severity vulnerability in MongoDB Rust Driver, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.5/10. Published 2026-08-27.
- How severe is CVE-2026-81526?
- Medium severity. CVSS v3 base score is 6.5 out of 10.