Vulnerability in MongoDB C Driver
CVE-2026-81524
A weakness in the MongoDB C Driver allows special elements in caller-supplied database and collection name components to pass without sanitization when the driver composes the target namespace for an operation. An application that incorporates untrusted input into these name components can have operations directed at a resource other than the one intended.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (17.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.3% 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: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/mongodb/mongo-c-driver/releases/tag/2.5.1 (Product)
- jira.mongodb.org/browse/CDRIVER-6424 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-81524?
- CVE-2026-81524 is a medium-severity vulnerability in MongoDB C Driver, classified under Resource Injection. CVSS score: 5.4/10. Published 2026-08-27.
- How severe is CVE-2026-81524?
- Medium severity. CVSS v3 base score is 5.4 out of 10.