CVE-2026-18693

published 2026-08-11

CVE-2026-18693: An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to…

Priority P3 43 high 7.6 CVSS 3.1

AV N AC L PR L UI N S U C L I L A H

An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to become inconsistent through certain document insertions. A subsequent insert into the affected bucket could then result in the server accessing memory outside its intended bounds, potentially causing a server crash (denial of service), exposure of limited memory contents, or memory corruption.

Affected

10 ranges

Vendor	Product	Version range	Fixed in
mongodb	mongodb	—	—
mongodb	mongodb	—	—
mongodb	mongodb	—	—
mongodb	mongodb	>= 7.0.0 < 7.0.40	7.0.40
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	>= 7.0 < 7.0.40	7.0.40
mongodb	mongodb_server	>= 8.0 < 8.0.29	8.0.29
mongodb	mongodb_server	>= 8.3.0 < 8.3.8	8.3.8

CVSS provenance

nvd v3.1 7.6 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

nvd v4.0 7.2 HIGH CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/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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CWE-787