What is CVE-2026-96748?

CVE-2026-96748 is a medium-severity vulnerability in MongoDB Python Driver, classified under CWE-177. CVSS score: 6.5/10. Published 2026-09-24.

How severe is CVE-2026-96748?

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

Vulnerability in MongoDB Python Driver

CVE-2026-96748

PyMongo's connection string parsing decodes percent-encoded characters in the host portion before the host list is separated on its delimiters. When an application places a hostname value supplied by an unauthenticated party into a connection string, that party may cause additional servers of their choosing to be added to the application's database client. The application may then send its authentication exchange and database operations to one of those servers, which can observe limited information and return altered results.

Published 2026-09-24 · last modified 2026-09-24.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

MongoDB Python Driver

Weakness classification (CWE)

CWE-177

References

Frequently asked questions

What is CVE-2026-96748?: CVE-2026-96748 is a medium-severity vulnerability in MongoDB Python Driver, classified under CWE-177. CVSS score: 6.5/10. Published 2026-09-24.
How severe is CVE-2026-96748?: Medium severity. CVSS v3 base score is 6.5 out of 10.