CVE-2026-8201: A use-after-free vulnerability exists in MongoDB's Field-Level Encryption (FLE) query analysis component, affecting client-side uses of mongocryptd and…

PriorityP357high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EPSS

0.13%

2.9th percentile

A use-after-free vulnerability exists in MongoDB's Field-Level Encryption (FLE) query analysis component, affecting client-side uses of mongocryptd and crypt_shared. Triggering this vulnerability requires control over the structure of a client's FLE-related query. This issue impacts MongoDB Server’s mongocryptd component v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

Affected

8 ranges

Vendor	Product	Version range	Fixed in
mongodb	mongodb	>= 7.0.0 < 7.0.34	7.0.34
mongodb	mongodb	>= 8.0.0 < 8.0.23	8.0.23
mongodb	mongodb	>= 8.2.0 < 8.2.9	8.2.9
mongodb	mongodb	>= 8.3.0 < 8.3.2	8.3.2
mongodb_inc	mongodb_server	>= 7.0 < 7.0.34	7.0.34
mongodb_inc	mongodb_server	>= 8.0 < 8.0.23	8.0.23
mongodb_inc	mongodb_server	>= 8.2 < 8.2.9	8.2.9
mongodb_inc	mongodb_server	>= 8.3 < 8.3.2	8.3.2

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvdv4.06.1MEDIUMCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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