Quick answers
- Is CVE-2026-120567 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-120567 being exploited in the wild.
- How severe is CVE-2026-120567?
- Medium severity, with a CVSS score of 5.4, published 3 November 2026.
- Which products and versions are affected?
- MongoDB Entity Framework Core Provider <UNKNOWN>.
- Is there a fix for CVE-2026-120567?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-120567 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-120567?
- Check whether you run MongoDB Entity Framework Core Provider at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is an expression injection flaw in the MongoDB Entity Framework Core provider's bulk update functionality. When user-supplied values are inserted into bulk update queries without proper neutralization of special elements, they can be interpreted as database expression syntax rather than plain data. This allows an attacker to modify unintended fields or relocate existing data within the same record during update operations.
Affected products
- MongoDB Entity Framework Core provider <UNKNOWN>
Timeline
- 2026-11-03: disclosed