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PyMongo: PYTHON-5986 Host injection in PyMongo connection string parsing via percent-encoded delimiters

CVE-2026-96748 affects pymongo. CVSS base score 6.5 (GitHub Advisory Database). EPSS 0.00257 (percentile 0.15776), scored 2026-10-04. Affected range: >= 3.5.0, <= 4.18.1. Fixed version: 4.18.2.

Published 2026-10-06 00:14:26.971120+00:00

CVE

CVE-2026-96748

Product

pymongo

CCR priority

26.1 /100 (P4)

CVSS

6.5 /10 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N · GitHub Advisory Database

EPSS

0.00257 · percentile 0.15776 · 2026-10-04

KEV

no

Affected products

• pymongo · >= 3.5.0, <= 4.18.1 · Fixed version: 4.18.2

Provenance

• GitHub Advisory Database · Source record · observed 2026-10-06 00:14:20.210633+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-96748.html