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Medium 4.3

System collection contents readable through a database change stream with showSystemEvents

CVE-2026-120816 First seen on SecPulse

Summary

A user with basic read-tier database privileges can use an option on a server-side data-change notification feature to receive the contents of certain restricted internal collections that the same user is refused on a direct read. The privilege check for the notification feature is derived only from...

Affected packages

PackageAffected → Fixed
MongoDBMongoDB Server
≥ 9.0.0, < 9.0.7→ 9.0.7
≥ 8.3.0, < 8.3.16→ 8.3.16
≥ 8.0.0, < 8.0.37→ 8.0.37
≥ 7.0.0, < 7.0.48→ 7.0.48
Original description The description as published by the source.

A user with basic read-tier database privileges can use an option on a server-side data-change notification feature to receive the contents of certain restricted internal collections that the same user is refused on a direct read. The privilege check for the notification feature is derived only from the target namespace and does not account for the option, so no additional permission is required. This may result in unintended access to data stored in those internal collections.

Source: CVE.org (CVE Program・cvelistV5) NVD

References

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