# CVE-2026-119675: mongorestore may bypass collection guards through a system.buckets prefix

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

MongoDB Database Tools mongorestore inconsistently handles the system.buckets. prefix when validating collection names in an untrusted dump. A specially crafted collection name can bypass special-collection guards and operator namespace filters, causing a restore to create an unauthorized user-chosen database account, including an account with the root role. Exploitation requires an operator to restore unauthorized user-controlled data using credentials with sufficient user-management privileges on the destination deployment. Excluding the admin namespace alone does not prevent this behavior. This issue affects MongoDB Database Tools versions 100.4.0 through versions before 100.20.1.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- MongoDB / Database Tools: ≥ 100.4.0; < 100.20.1 (affected, semver). Source: CNA: mongodb

## Severity and prioritization

- CVSS 4.0: 5.2 (medium); CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H; source: CNA: mongodb

- CVSS 3.1: 8.6 (high); CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H; source: CNA: mongodb

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-706

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/mongodb/mongo-tools/blob/master/CHANGELOG.md (CNA: mongodb)

## Provenance

- CNA: mongodb: https://www.cve.org/CVERecord?id=CVE-2026-119675; retrieved 2026-11-03; source updated 2026-11-03

Revision: 1e4b71e7636b0d774f108668e889c5efde7ac67012d864084affac1aad7b4277

Canonical: https://y2.dev/cve/CVE-2026-119675

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