What is CVE-2025-14911?

CVE-2025-14911 is a medium-severity vulnerability in Mongodb Mongo-C-Driver, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2026-01-27.

How severe is CVE-2025-14911?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Mongodb Mongo-C-Driver

CVE-2025-14911

User-controlled chunkSize metadata from MongoDB lacks appropriate validation allowing malformed GridFS metadata to overflow the bounding container.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (19.7th percentile) — read the EPSS interpretation.

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:N/A:H.

Affected products

Mongodb Mongo-c-driver — versions 0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

cna@mongodb.com

Frequently asked questions

What is CVE-2025-14911?: CVE-2025-14911 is a medium-severity vulnerability in Mongodb Mongo-C-Driver, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2026-01-27.
How severe is CVE-2025-14911?: Medium severity. CVSS v3 base score is 6.5 out of 10.