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OpenAdvisories
High · 8.1 CVE-2026-18690 EUVD-2026-56881GHSA-494v-9jwj-989h

Improper Authorization in MongoDB Server Allows Unauthorized Actions on System Collections

Published Aug 11, 2026 · Updated Aug 11, 2026 · Assigned by mongodb

Description

An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that their assigned privileges should not permit. This could result in critical system collections being dropped and recreated without proper authorization.

Affected products

VendorProductAffectedFixed
MongoDB MongoDB Server 8.3.0 – < 8.3.8, 8.0 – < 8.0.29, 7.0 – < 7.0.40 8.3.8

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Ubuntu Pro 20.04 LTS mongodb No fix yet —
Ubuntu Pro 18.04 LTS mongodb No fix yet —
Ubuntu Pro 16.04 LTS mongodb No fix yet —
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 14.04 LTS mongodb No fix yet —

Advisories 1

References