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.

CVSS 4.0

5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 18% of CVEs (scores of 2026-10-25)

CWE

CWE-99

Published

2026-08-27

Modified

2026-09-29

Record from

the NVD, synced 2026-10-19

Affected

• mongodb:c_driver

References

• https://github.com/mongodb/mongo-c-driver/releases/tag/2.5.1
• https://jira.mongodb.org/browse/CDRIVER-6424

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