CVE-2026-82059

published 2026-09-08

CVE-2026-82059: An internal aggregation expression in MongoDB Server was incorrectly registered as accessible to any authenticated user rather than being restricted to…

Priority P3 35 medium 6.5 CVSS 3.1

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

An internal aggregation expression in MongoDB Server was incorrectly registered as accessible to any authenticated user rather than being restricted to internal cluster operations. By crafting a malformed index specification within this expression, an authenticated user with read-only privileges could trigger an assertion failure in the index key generation code path. In certain build configurations, this assertion failure results in termination of the mongod process, causing a denial of service to all connected clients.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
mongodb	mongodb	>= 7.0.0 < 7.0.41	7.0.41
mongodb	mongodb	>= 8.0.0 < 8.0.30	8.0.30
mongodb	mongodb	>= 8.3.0 < 8.3.9	8.3.9
mongodb	mongodb_server	>= 7.0.0 < 7.0.41	7.0.41
mongodb	mongodb_server	>= 8.0.0 < 8.0.30	8.0.30
mongodb	mongodb_server	>= 8.3.0 < 8.3.9	8.3.9

CVSS provenance

nvd v3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd v4.0 6.0 MEDIUM CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/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-617