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Description

A user with access to the cluster with a limited set of privilege actions can trigger a crash of a mongod process during the limited and unpredictable window when the cluster is being promoted from a replica set to a sharded cluster. This may cause a denial of service by taking down the primary of the replica set. This issue affects MongoDB Server v8.2 versions prior to 8.2.2, MongoDB Server v8.0 versions between 8.0.18, MongoDB Server v7.0 versions between 7.0.31.

PUBLISHED Reserved 2026-03-30 | Published 2026-03-30 | Updated 2026-03-30 | Assigner mongodb




MEDIUM: 6.0CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

MEDIUM: 5.3CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-617: Reachable Assertion

Product status

Default status
unaffected

8.2 (custom) before 8.2.2
affected

8.0 (custom) before 8.0.18
affected

7.0 (custom) before 7.0.31
affected

References

jira.mongodb.org/browse/SERVER-101758 vendor-advisory

cve.org (CVE-2026-5170)

nvd.nist.gov (CVE-2026-5170)

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