# CVE-2026-120567: ExecuteUpdate may evaluate caller-supplied values as MongoDB expressions

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

The MongoDB Entity Framework Core provider does not neutralize special elements when it places a caller-supplied value into a bulk update that is expressed as a databasea result, a value supplied as plain data may be interpreted by the database as expression syntax. A part value through normal application input may causeunintended modification of fields in the records the application is updating, and may cause data already held in those records to be relocated into other fields of the same record.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- MongoDB / Entity Framework Core Provider: ≥ 9.1.3; ≤ 9.1.4 (affected, semver); ≥ 10.0.3; ≤ 10.0.4 (affected, semver). Source: CNA: mongodb

## Severity and prioritization

- CVSS 4.0: 2.3 (low); CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N; source: CNA: mongodb

- CVSS 3.1: 5.4 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N; source: CNA: mongodb

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-943

## Exploit evidence

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

## References

- https://jira.mongodb.org/browse/EF-478 (CNA: mongodb)

## Provenance

- CNA: mongodb: https://www.cve.org/CVERecord?id=CVE-2026-120567; retrieved 2026-11-03; source updated 2026-11-03

Revision: 0fa6f9e91f0a03d27384afa949c9ed07072631130517c20c6b199bb789b0bfa3

Canonical: https://y2.dev/cve/CVE-2026-120567

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