CVE-2026-18687: MongoDB Server's handling of a Queryable Encryption maintenance operation did not properly validate certain request parameters against the collection's…

PriorityP340high7.1CVSS 3.1

AVNACLPRLUINSUCNILAH

EPSS

0.23%

13.5th percentile

MongoDB Server's handling of a Queryable Encryption maintenance operation did not properly validate certain request parameters against the collection's encrypted field configuration before use. An authenticated user with readWrite privileges could submit a specially formed request that leads to a server crash or excessive internal writes, resulting in resource exhaustion and corruption of encrypted index data.

Affected

9 ranges

Vendor	Product	Version range	Fixed in
mongodb	mongodb	—	—
mongodb	mongodb	—	—
mongodb	mongodb	—	—
mongodb	mongodb	>= 8.0.0 < 8.0.29	8.0.29
mongodb	mongodb	8.2.0 – 8.2.12	—
mongodb	mongodb	>= 8.3.0 < 8.3.8	8.3.8
mongodb	mongodb_server	>= 8.0 < 8.0.29	8.0.29
mongodb	mongodb_server	>= 8.3.0 < 8.3.8	8.3.8
weblate	weblate	>= 0 < 5.17	5.17

CVSS provenance

nvdv3.17.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

nvdv4.07.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/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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