# CVE-2026-119674: mongorestore may restore encoded collection names into an unintended collection

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

MongoDB Database Tools mongorestore incorrectly URL-decodes an original collection name read from metadata when the corresponding dump filename has been truncated. A database user who can create and populate a suitably encoded collection can cause a later authorized directory restore to write those documents into a different collection that the user cannot modify directly. When both collection names resolve to the same destination, backed-up documents may be omitted; use of --drop can also replace the unintended destination collection. Exploitation requires an operator to restore the affected collection from a directory dump with write access to the destination. This issue affects MongoDB Database Tools versions 100.0.2 through versions before 100.20.1.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- MongoDB / Database Tools: ≥ 100.0.2; < 100.20.1 (affected, semver). Source: CNA: mongodb

## Severity and prioritization

- CVSS 4.0: 2.1 (low); CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N; source: CNA: mongodb

- CVSS 3.1: 3.7 (low); CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L; source: CNA: mongodb

- CVSS 4.0: 2.1 (low); CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:L/VA:L/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; source: NVD: cna@mongodb.com

- CVSS 3.1: 3.7 (low); CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L; source: NVD: cna@mongodb.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

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

- Weaknesses: CWE-174

## 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)

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

## Provenance

- CNA: mongodb: https://www.cve.org/CVERecord?id=CVE-2026-119674; retrieved 2026-11-03; source updated 2026-11-03

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-119674; retrieved 2026-11-04; source updated 2026-11-03

Revision: 4454d862fae0cfbbc2a4b6abb8253ae3e8134a93200c638c2fc5f83cd8006bfa

Canonical: https://y2.dev/cve/CVE-2026-119674

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